Media Vendor & Contributor Credits

@h4 PGO Video Credits @h6 PGO Animal Videos [b]Getty Videos:[/b] * BBC Natural History (Aye-Aye), (blue dragon sea slug), (fennec fox), (markhor), (naked mole rat), (snowshoe hare) * Bob Hilscher (magnificent frigatebirds) * Discovery Access (bloodhound), (deep sea squid), (swordfish) * Discovery FootageSource (musk oxen), (tapirs) * Feargus Cooney (cave spiders) * Film Studio Aves (jerboas) * Joao Inacio (sea cucumber) * Johner Motion (wolverine) * Multi-bits (Narwhal) * naturepics_li (sea sponge) * Neil Bromhall (opossum) * Oxford Scientific Films (Sea wasp), (trapdoor spiders) * Photolibrary (mole) * Photolibrary Pty Limited (aardvark) * Photolibrary Pty Limited (kinkajous) * zygis41 (frogs) [b]iStockphoto Videos: [/b] * Anna Bryukhanova (dachshund) * Anna Solovei (hamster) * Aristine (moth) * Christopher Burke (golden retriever) * Claudio Rossol (About Reptiles) * David Partington (hedgehog) * David Snow (animal migration) * dpshp (mosquitos) * dsnow (vulture) * HDCineman (wasp) * imv (lemur) * jnxyz (firefly) * John Neff (polar bear) * JohnCarnemolla (emu) * koch Valerie (chamerleon) * Lautrup7 (earthworm) * Luxxtek (crab) * mviamonte (nocturnal animals) * photoBlueIce (hippo) * picmov (sea horse) * piola666 (toad) * robotboot (cicadas) * Scott Merryweather (blue jays), (monarch butterfly) * Simon Krzi (german shephard) * simonkr (gibbon) * Skip Hunt (Animal communication) * Uli Hamacher (bearded dragon), (mealworm) * webclipmaker (geese) * zistos (hyenas) [b] Karon Dubke Videos: [/b] * Capstone Publishers (American Quarter Horses), (Appaloosa), (Arabian Horse), (chihuahuas) (ferret), (guinea pig), (hermit crab), (newt), (palomino horse), (poodle), (pug) [b] Science Source Videos: [/b] * Dr. Ken Macdonald/SPL (tube worms) [b] Shutterstock Videos: [/b] * 8K (catfish) * AerialCinematics (Galapagos penguin) * Africa Cinematography (pangolins) * AlexDrone (French bulldog) * Alexsander Shabataev (german shorthair pointer) * allstarpl.com (giraffe), (jackal) * andre baget (jack rabbit) * Andrew Lundquist (flies) * Andriy Nekrasov (sea squirt) * Andy J Billington (Humboldt penguin) * Anton Rodionov (gentoo penguin), (macaroni penguin), (polar animals) * ANURAK PONGPATIMET (American Shorthair Cats) * APN Photography (Weimaraner) * Art_Vision (bichons frises) * Arto Hakola (muskrat) * Artush (ostrich) * atiger (kingfisher) * AV Geeks (snowy owl) * azuri (coatis) * Banana Republic images (dragonfly), (yak) * Benny Marty (quokkas) * biggunsband (Burmese cat) * BlackBoxGuild (Bassett hound), (jaguar) (leafy sea dragon), (ocelot), (rat terrier) * Bote (giant spider crab) * canbedone (donkey) * CandelaCut (cardigan welsh corgi) * Chonlawut (milliped) * Chris Axline (hummingbird) * Christine Wilson Photos (Bernese mountain dog) * clickit (beetles) * DiMedia (pig) * DOTV (ibises) * dotv2 (gray fox) * Doug Jensen (crane), (Labrador retriever) * DPS (grizzley bear), (red fox) * Dr Morley Read (coral snake), (Anacondas), (termites) * Dudarev Mikhail (king penguin) * e_motion_media (Beagles) * Earth Trotter Photos (chinstrap penguin) * Edger Lee Espe (loon) * EF Media (fiordland penguin) * eleonimages (silverfish) * Elfik24 (swans) * Emre Ozkan (pet birds) * eric.walter (arctic tern) * Ethan Daniels (sea snake) * EUStock (sheep) * feathercollector (birds of paradise) * FineVideo (thoroughbred horses) * fischkopf (clown fish) * Flight Video and Photo (pheaseant) * Flystock (pelican) * FootageLab (sun bear) * FoxtrotMedia (rottweilers) * Frankie Fok (thresher shark) * freeproduction (sphynx cat) * Galyna Andrushko (magellanic penguin) * Gorodenkoff (Pomeranian) * Graziano Marietta (Australian Shepherds) * Hans Gert Broeder (cuscus) * Henry Harrison (Arctic Fox) * Homasfilm (boston terriers) * Immersion Imagery (wombat) * Iren Key (dalmatian) * James Benet (cocker spaniel) * James Jones Jr (Shetland sheepdogs) * Joeri Calis (bonobos) * Kasinpoj Wiriyakajorntham (cobra) * KAVSS (bumblebees) * Kerry Garvey (orioles’) * Kerry Hargrove (Avocets) * KinoMasterskaya (chinchillas) * linlamlm (goat) * Longjourneys (giant clams), (lobster) * Maarten van Rouveroy (Angelfish), (oysters) * Madeeva_11 (great dane) * malicedoll (bull terriers) * ManuMata (Galapagos tortoise) * mariyaermoleva (maine coon cat) * Marlene Greene (robin) * Martin Harvey (meerkat) * MAStock (boxers) * meyblume (quetzal) * Michael Cummings (heron) * Mikhail Kolesnikov (lion) * Mukola (centipede) * NHNZ Moving Images (erect crested penguin), (scoirpion), (snares penguin) * Nick Rains (royal penguins) * NielsD (Asian Elephants) * NSC Photography (manx cat) * NZ Video Productions (kiwi) * Oleg Pustovoyt (Scottish terrier) * Oleksandr Umanskyi (walrus) * Ondrej Prosicky (toucan) * Osadchaya Olga (seal) * PaaTon (persian cat) * Paul Russell (mice) * Photos of Africa (leopard) * photosbyjohn (cow) * Polaris Visuals (rockhopper penguin) * Production Perig (Siamese cats) * Pronghorn Productions (caribou) (coyote) (crow) (desert animals) (echidnas) (grouse) (moose) (porcupine) (prairie dog) (red panda) (red wolves) * Pumbastyle (Spanish water dog) * pzAxe (pillbig) * R .Mike Jacobson (mule) * rexy (silkworm) * Richard Whitcombe (cuttlefish) * Rick Ray (Alligators), (dingos), (maragay) * risteski goce (turtle) * Rosa Lima (saint Bernard) * Ryan M. Bolton (Bengal tigers) (boa constrictors) * Sabangvideo (wobbegongs) * Saint Thomas Productions (whale shark) * Satvchannel (rhino), (African Elephant) * schlyx (praying mantis) * Scott Cornell (okapi) * Serge K (shiba inu) * Sergey Novikov (chamois) * SevArt (earwig) * Sheila Fitzgerald (blue morpho butterflies) * Shelepow (Siberian husky) * shetlandvideo.com (Shetland pony) * Shtrykul Kostiantyn (miniature pinscher) * Shuyi Ll (yellow eyed penguin) * Sibuet Benjamin (pet rabbit) * Simo80 (llama) * SkyHighStudio (gray whale) * sonicbox (Airedale Terriers) * Stanislav Duben (crayfish) * Stefan Beckhusen (mambas) * Stephen Finn (giant panda) * steve bushman (servals) * Steve Byland (woodchuck) * Steve Photography (civets) * stevenshea (American Staffordshire Terriers) * Stock Footage Inc (flamingo) * Storytellers (Axolotls) * taewafeel (little penguin) * takepicsforfun (puffin) * Targn Pleiades (snow leopard) * thopter18 (collies) * TierneyMJ (inchworm) * Tom Tuthill (gerbil) * Undersea (tang fish) * underwatercam.tv (killer whale) * unterwegs (Anemone’s) * Ute Jung (painted lady butterfly) * Video_StockOrg (shih tzus) * VIDEODIVE (sea turtle) * Vovakys (greyhound) * wavebreakmedia (Yorkshire terriers) * weberjake (squirrels) * WF (Tasmanian devil) * wildestanimal (mako shark) * wildshot (Amur Leopards), (emerald tree boa) * Willyam Bradberry (blue whale) * worldclassphoto (macaw) * Y production (caracal) * Zygimantas Cepaitis (piranha) [b] ThoughtEquity Videos: [/b] * ThoughtEquity (About Ampjibians), (About Birds), (About Fish), (About Insects), (About Invertebrates), (About Mammals), (About Spiders), (Adelie Penguin), (African Penguin), (Anteater), (Antelope), (Ants video), (arctic hares’), (Armadillo), (Baboon), (Badger), (Barracudas), (Basking Sharks), (Bats), (beaver), (beluga whales), (bison), (black bears), (black widow spiders), (blue shark), (bobcats), (camels), (Canada goose), (capybara), (cardinal), (cheetah), (chickens), (chimpanzee), (chipmunk), (corals), (cottonmouth snake), (cougar), (cricket), (crocodile), (deer), (dolphin), (duck), (eel), (emperor penguin), (English bulldogs), (falcon), (garter snake), (gecko), (gila monster), (gorilla), (grasshopper), (grassland animals), (great white shark), (hammerhead shark), (hawk), (hibernation), (Honey bee), (howler monkey), (humpback whale), (iguana), (jellyfish), (kangaroo), (koala), (Komodo dragon), (ladybug), (lemming), (lynx), (manatee), (nurse sharks), (ocean animals), (octopus), (orangutan), (owls), (parrotfish), (parrots), (peacock), (pet fish), (platypus), (puffer fish), (python), (raccoon), (rain forest animal), (rattlesnake), (river otter), (salamander), (salmon), (sea lion), (sea otter), (sea star), (skunk), (sloth), (snail), (sparrow), (sperm whale), (spider monkey), (squid), (stingray), (sugar glider), (tarantula), (tiger shark), (tiger), (trout), (walking stick), (wetland animals), (wild turkey), (wolf spider), (wolves), (woodland animals), (woodpecker), (zebra) @h6 PGO Biographies Videos [b] Alamy Videos: [/b] * Pond5 (James Buchanan), (Terry Fox) [b] Associated Press Videos: [/b] * Associated Press (Brett Kavanaugh), (Bubba Wallace), (Derek Jeter), (Dorothy Vaughan), (Elena Delle Donne), (H.E.R.), (JJ Watt), (John Danny Olivas), (Jojo Siwa), (Kizzmekia Corbett), (Maurice Sendak), (Megan Rapinoe), (Suni Lee), (Tom Holland) * AP Ents (Aretha Franklin) * AP Television (Diana Taurasi), (Domingo Liotta), (Gordie Howe), (Jacoby Ellsbury), (Maya Lin) (Ruby Bridges), (Tom Brady) * APTN (Colin Powel) * Celebrity Footage (Harry Styles) * Chris Pizzello (Billie Eilish) * NASA (Jessica Watkins) (John Herrington) (Nicole Mann) * NASA TV (Kalpana Chawla), (Scott Kelly) * POOL (Bruno Mars), (Elena Kagan), (John Roberts), (Laura Bush), (Samuel Alito) * SNTV (Alex Ovechkin), (Connor McDavid), (Dirk Nowitzki), (Giannis Antetokounmpo), (Jessica Long), (Katie Ledecky), (Naomi Osaka), (Sidney Crosby), (Sue Bird) * UPITN (Fannie Lou Hamer), (Rachel Carson) [b] Capstone Press Videos: [/b] * Capstone Press (Davy Crockett), (Michael Dahl) * Illustrations by Jason Millet (Johnny Appleseed) [b] Greg Stotelmyer Videos: [/b] * Courtesy of Greg Stotelmyer, ABC 36, WTVQ-DT LLC (Daniel Boone) [b] Critical Past Videos: [/b] * Critical Past (John Hancock) [b] Getty Images Videos: [/b] * Getty Images, (Bangtan Boys (BTS) * ABC News VideoSource (Nancy Reagan) * Aerial HD Stock LLC (Milton Hershey) * AFP (George Washington), (Neil Gorsuch), (Pope Francis), (Stephen Breyer), (Usain Bolt), (Venus Williams) * AFPTV (Abraham Lincoln) (Gabby Douglas) (Julian Castro) (Lionel Messi) (Patrick Mahomes) (Rafael Nadal) * Archive Films (Alexander Graham Bell), (Bessie Coleman), (Jim Thorpe), (John F. Kennedy), (Langston Hughes), (Louis Armstrong), (Martin Luther King), (Muhammad Ali), (Roberto Clemente), (Walt Disney), (Wilma Rudolph), (Wilt Chamberlain) * Bank Film (James A. Garfield) * BBC Universal (Leif Erickson) * Bloomberg Video-Footage (Steven Chen) * Brian Craig (Drew Brees), (Malala Yousafzai), (Shakira), (Simu Liu), (Tony Romo) * Charles Kim (Halle Bailey) * Chip Somodevilla (Ketanji Brown Jackson) * Colleen Ryan (Vera Wang) * Encyclopaedia Britannica Films – Footage (Cesea Chavez) * FCCE Films and Stars/Footage Partner (Dwayne Johnson) * Feature Story News (Barack Obama), (Clarence Thomas), (Jeremy Lin), (John McCain), (Sandra Day O’Connor), (Sonia Sotomayor) * FedNet (Amanda Gorman), (Amy Coney Barrett), (Carter G. Woodson), (Catherine Cortez Masto), (Dan Crenshaw), (Jill Biden), (Kamala Harris) * Film Audio Services – Footage (Althea Gibson), (Ellison Onizuka) * Getty Image Video (David Beckham) * Getty Images Entertainment (Candace Parker), (Chloe Kim) * Getty Images Video (Awkwafina), (Chadwick Boseman), (Jennifer Lopez), (John Cena), (Judy Heumann), (Kareem Abdul-Jabbar), (Karlie Kloss), (Kevin Durant), (Kristen Bell), (Lisa Leslie), (Lizzo), (Lynda Carter), (Marley Dias), (Michael J. Fox), (Mindy Kaling), (Mo’ne Davis), (Russell Westbrook), (Russell Wilson), (Selena Gomez), (Stephen Curry), (Taylor Swift), (Zendaya) * Grinberg, Paramount, Pathe Newsreels (Anna May Wong), (Eleanor Roosevelt), (Ralph Bunche) * Habib Semaan (Hoda Kotb) * Hearst Newsreel (Albert Einstein), (Amelia Earhart), (Franklin D. Roosevelt), (Helen Keller), (Pablo Picasso) * Image Bank Film (John Adams), (Juan Ponce de Leon), (William Henry Harrison) * ITN (Ada Lovelace), (Alan Turing), (Anthony Kennedy), (Bindi Irwin), (Ellie Simmonds), (Farouk el-Baz), (George Takei), (Greta Thunberg), (Jacques Cousteau), (Leonardo da Vinci), (Michael Jordan), (Mikhail Baryshnikov), (Misty Copeland), (Prince Charles), (Prince Harry), (Prince Philip), (Roald Dahl), (Shirley Chisholm), (Stacey Abrams), (Steve Jobs), (Wangari Maathai) * Archive Limited (William J. Clinton) * Jeremy Hogan (Joe Biden) * John Dacanay – WI (Larry Bird), (Danica Patrick) * Korey Martin (Nadia Murad) * Kyodo News Video (Shohei Ohtani) * Lucas Mayer (Mike Trout) * Marcus DiPaola – Footage (Melania Trump) * Mark Case (Dr. Seuss) * Ming Yeung (Ellen DeGeneres) * NBC News Archives (Bill Gates) * Nexstar - KTLA * Los Angeles (Marco Rubio), (Selena) * Nexstar - WGN, Chicago (Mahalia Jackson), (Walter Peyton) * Onyx Media Llc – Footage (Bill Russell), (Peggy Flemming), (Babe Ruth), (Ellen Ochoa) * Sherman Grinberg Library (Herbert Hoover), (Jane Addams), (Marie Curie) * Sky News/Film Image Partner (Ed Sheeran), (Kate Middleton), (Meghan Markle), (Prince William), (Princess Diana), (Queen Elizabeth), (Roger Federer), (Serena Williams) * Smithsonian (Robert Smalls), (Sacagawea), (Sitting Bull) * Stringr (Doug Emhoff), (Simone Biles) * Texas Archive of the Moving Image-Footage (Lady Bird Johnson) * The March of Time (Stephen F. Austin) * The Netherlands Institute for Sound and Vision (Anne Frank) * Thomas Bolwell – FIFA (Mallory Pugh) * Tomas Abad-Footage (Neil deGrasse Tyson) * Tribune Broadcasting - Anna Burkart (Barbara Bush), (Coretta Scott King), (Lin-Manuel Miranda), (Mia Hamm), (Oprah Winfrey), (Tammy Duckworth), (Yo-Yo Ma) * Fabiola Franco (Justin Timberlake) * KDVR, Denver (Peyton Manning) * Kelsey Kind (Condoleezza Rice) * VCG (James Harden) * Wazee Archival (Babe Diedrickson Zaharias) * Wirehouse Images (Julia Hill) * WireImage House (Al Gore), (Alex Morgan), (Beyonce), (Billie Jean King), (Brian Boitano), (Dolores Huerta), (Drake), (Graham Greene), (Hank Aaron), (Indra Nooyi), (Jerry Rice), (Jessica Alba), (John Ledgend), (Joy Harjo), (Kristi Yamaguchi), (Lindsey Vonn), (Madeleine Albright), (Magic Johnson), (Michelle Kwan), (Oscar De La Hoya), (Scott Hamilton), (Tyler Perry), (Wayne Gretzky) * WireImage/Carol Shayne (Ruth Bader Ginsburg) * WPA Film Library (Betty Ford), (Clara Barton) [b] Library of Congress Videos: [/b] * Library of Congress (Theodore Roosevelt) [b] NASA Videos: [/b] * NASA (Galileo) (Neil Armstrong) (Sally Ride) * redOrbit (Charles Darwin) [b] National Archives & Records Administration Videos: [/b] * National Archives & Records Administration (George W. Bush) [b] National Space Society Videos: [/b] * National Space Society (Mae Jemison) [b] North Wind Picture Archives Videos: [/b] * North Wind Picture Archives (Christopher Columbus), (Martha Washington), (Squanto) [b] Nikki Shannon Smith Videos: [/b] * Photo courtesy of Nikki Shannon Smith (Nikki Shannon Smith) [b] Photo Researchers Inc Videos: [/b] * Jessica Wilson (Susan B. Anthony) [b] Science Source Videos: [/b] * Jessica Wilson (Benjamin Franklin) [b] Shutterstock Videos: [/b] * American Productions (Chester A. Arthur), (Franklin Pierce), (Martin Van Buren) * Ashley Roman (Sam Walton) * CelebrityFootage (Kelly Clarkson) * Chasecom Media (Alexandia Ocasio-Cortez) * CrackerClips Stock Media (Crazy Horse) * Craig McCourry (Betsy Ross) * DIRK CAN DER VEN MEDIA (Lewis Latimer) * F-Stock (Ralph Baer) * Film Master (Pocahontas), (Thomas Jefferson) * Flight Video and Photo (Nikola Tesla) * fotosullenuvole (Diego Rivera) * James Benet (Isaac Newton) * Jill Fromer (Francis Scott Key) (Phillis Wheatley) * Jim Watt (Frederick Douglass) * leungchopan (Louis Braille) * Nevetsyad (James Madison) * Pal2iyawit (Michelle Wie) * Rick Ray (Alexander Hamilton), (Booker T. Washington), (Cyrus McCormick), (Doris Miller), (Edith Wilson), (Eli Whitney), (Elizabeth Cady Stanton), (Georgia O’Keeffe), (Grover Cleveland), (Jack Nicklaus), (John Lewis), (Lewis and Clark), (Lyndon B. Johnson), (Marco Polo), (Nathan Hale), (Paul Revere), (Pele), (Philip Downing), (Richard M. Nixon), (Robert Fulton), (Rosalynn Carter), (Ulysses S. Grant), (Warren G. Harding), (William H. Taft), (William McKinley), (William Penn), (Woodrow Wilson), (Wright Brothers) * Scott Cornell (Wallace Amos) * SkyworksRF (Faith Spotted Eagle), (Florence Nightingale), (Harriet Beecher Stowe) * Stockphoto Video (Steven Chu) * SVTeam (George Crumb) * Ted Heck (Andrew Jackson) * Travelling Thilo (Frida Kahlo) * Tsado (Chief Joseph) * Zenstrata (John Muir) [b] ThoughtEquity Videos: [/b] * ThoughtEquity (Duke Ellington), (Dwight Eisenhower), (Gandhi), (George Washington Carver), (Henry Ford), (Jackie Robinson), (Jacqueline Kennedy), (Jacques Cartier), (Jane Goodall), (Jesse Owens), (Jimmy Carter), (Jonas Salk), (Louis Pasteur), (Marian Anderson), (Matthew Henson), (Michelle Obama), (Mother Teresa), (Nelson Mandela), (Rose Parks), (Sam Houston), (Thomas Edison) [b] TMW Media Group Videos: [/b] * TMW Media Group (Charles Drew) [b] U.S Department of Interior Videos: [/b] * U.S. Department of Interior, National Park Service, Adams National Historical Park (Andrew Johnson) [b] V.T. Bidania Videos [/b] * V.T. Bidania (V.T. Bidania) [b] Saadia Faruqi Videos: [/b] * video courtesy of Saadia Faruqi (Saadia Faruqi) [b] Visual Concepts Entertainment Videos: [/b] * Visual Concept Entertainment, Inc./Getty Images (Harry S. Truman) @h6 PGO Science Videos [b] Artbeats Videos: [/b] * Artbeats (Rainbows) [b] Dreamstime Videos: [/b] * Brett Critchley (Endangered Threatened Animals, lion) * Daniel76 (Wetland Plants, trees) * Juan Camilo Bernal (Wetland Plants, birds) * Petr Gnuskin (Mosses, rock, and water) * StockShots (Mosses, boggy place) * Yelena Rodriguez (Temperature, woman and son) [b] Fotosearch Footage Videos: [/b] * Fotosearch Footage (Moon Phases) [b] Getty Images Videos: [/b] * Andrew Sacks (Printmaking) * ApexStock (Temperate Forest, fall colors) * Archive Films (Snowflakes) * BBC Universal (Animals in Spring, deer), (Drought, capybaras), (Soil, worm), (Tsunamis) * Chris Pritchard (Traffic Lights) * Discovery Access (Insect Metamorphosis, caterpillar) * Discovery-FootageSource (Fossils, hand in dirt), (Geologist), Galloabraham (Mailboxes) * Grinberg, Paramount, Pathe Newsreels (Light Bulbs) * Image Bank Film (Climate, Autumn aerial), (Paleontologist, archeologist), (Plants in Fall, leaves growing), (Plants in Spring, bee), (Soil, beet harvest), (Sunglight), (Tropical Rain Forests, tree tops), (Wind) * Imazins (Canyons) * Matt Cardy (Artificial Intelligence) * MediaProduction (Oases) * NASA Images Archiving LLC (Hurricanes, radar hurricane) * Photolibrary Pty Limited (Calendars) * Prelinger (Dishwashers) * Rubberball (Plants in Spring, tree budding), (What is Sky, desert) * Science Photo Library (Black Holes), (Waterfalls) * simonkr (Pollination) * Sky News/Film Image Partner (Comic Making), (Potato Chips) * skyfilming.com (Coasts) * Smithsonian (Ovals, runners) * Thomas Barwick (Engineers) * Ultra Film (Refrigerators) * Vyacheslav Makaryev (Paper) * Yellow Dog Productions Inc. (People of Spring, rain puddles) [b] iStockphoto Videos: [/b] * adaman (What are Plants, germination), (What is Motion, toy car) * Akurra (Hearing, ear to brain) * apshel (Dewn and Forest, grass) * Atelopus (Tropical Rain Forests, ants) * bladeborge (The Planets) * brittmct (Hot weather, boy in ocean) * BullpenAl (What is Matter, water boiling) * craftvision (Gravity, feather), (Gravity, trampoline) * creisinger (What is Motion, cradle) * danku (Neptune, rotating) * dsander2 (People in Summer, waterskiing) * dualstock (Energy, soccer) * edgelore (Animals in Spring, birds) * entplex (Avalanches, controlled) * Eraxion (Muscular Systems, human muscle) * erhancerrahoglu (Plastic as Material, cut plastic) * GKinion (Energy, wind energy) * illuworld (Plants in Winter, forest) * jamesbenet (Colors, prism) * jd_field (Glaciers, glacier calving) * JohnCarnemolla (Drought, dust storm) * kelmedia (What is the Solar System, solar system) * kfleen (Answers and Solutions, boys) * kosinak (Hot Weather, sunscreen), (Plastic as Material, bottle production) * Lautrup7 (Animals in Fall, Squirrel) * lewkmiller (Kinds of Forces, baseball player) * Medialinkllc (Mountains, fall scene) * mericsso (Friction, sanding) * mnn (Paper as Material, sawing wood) * morganl (People in Fall, trick or treating) * nickp37 (Fruits and Seeds, stawberrys) * red_moon_rise (What is Matter, water freeze) * robyvannucci (What is Light, laser lights) * rogertb (What is Weather, various weather) * rollandcut (Magnetism, nails), (Magnetism, scrap metal) * RWBrooks (What is Earth, sharks) * schismstudios (Sound, sound waves) * shok-design (Metal as Material, heated metal), (Metal as Material, steel) * simonkr (Stems and Trunks, twig) * SimonSkafar (Friction, skiing), (Mass and Weight, scale) * SimonSpear (What is Light, turtle) * SoraPhotography (Rubber as Material, rubber ball) * synthetic (Colors, rainbow) * thomasd007 (Wood as Material, chop wood) * toddmedia (Paper as Material, recycled paper) * tunart (Glass as a Material, glass factory) * twigymuleford (What are Plants, cotton woods) * vectorarts (Wood as Material, trimmer) * VENEMANO (Jupiter, Jupiter and sun) * viafilms (Glass as a Material, breaking glass), (Kinds of Forces, balloons) * vincentedonoso (Animals in Summer, Hummingbird) * voshadhi (Electicity, hydropower) * webclipmaker (Thunderstorms) * wildacad (Ice Hail and Sleet, hail in grass) * WLantana (Rubber as Material, rubber tapping) * yaschan79 (Electricity, transmission) [b] Marcio Cardosa Videos: [/b] * Footage Search (Oceans, sea lion) [b] NASA Videos: [/b] * NASA (Astronaunts, eating), (Astronauts, space walk), (Earth, earth), (Earth, zoom in), (First Moon Landing, flag on moon), (First Moon Landing, step on moon), (Jupiter, red spot), (Mars, rotation), (Mars, rover), (Mercury, probe), (Mercury, surface), (Meteor Asteroids, fireball earth), (Meteor Asteroids, meteor), (Moon, moon rotation), (Neptune, atmosphere), (Pluto), (Saturn, Saturn in space), (Saturn, Saturn rings), (Spacecraft, shuttle landing), (Spacecraft, shuttle takeoff), (Stars, exploding star), (Stars, stars in sky), (Sun, active part sun), (Sun, ultraviolet light), (The Water Cycle), (Uranus, time lapse), (Venus, Magellan misson) * NASAeClips (What are Clouds, clouds from plane) [b] Pond5 Videos: [/b] * pond5 (Floods), (Mountains, goats), (Types of Clouds, wispy clouds) * ajtooley (Uranus, in space) * designone (Pumpkin Harvest) * hdnaturefootage (Grasslands, prairie dogs), (Spring Weather) * lovemushroom (Water as Material, droplets), (Water, droplets) * mediaoffline (Moon, traveling to moon) * ODesigns (Summer Weather) * phantomewo (People in Winter, snowblower) * RedBlue (Types of Clouds, central park clouds) * Starbirdprod (Water as Material, surfer), Water, surfer) [b] Shutterstock Videos: [/b] * 10incheslab (Density and Volume, milk glass) * 3Dsculptor (Satellites) * 5DVideoShooter (Grassland Plants, bison) * a178design (Triangles) * africa924 (What are Animals, elephant) * Alan Lucchetti (Fog) * Alex Cherepanov (Cameras) * AlexeyD (Variables) * alexnako (What is Sky, clouds) * Alila Medical Media (Digestive, digestive juices), (Hearing, sound waves), (Respiratory System, airflow), (Seeing, eye anatomy) * Alis Photo (Smooth Rough, stone road) * alphaglobal (Leaves, ferns), (Science and Math, landscape) * Ammit Jack (Rain Forest Plants, waterfall) * Anastasia Pelikh (Minerals and Gems) * andre baget (Desert Plants, cactus), (Desert Plants, desert) * Andrey Solovev (Computer Software) * Andriy Oleksienko (Social Media) * Anton Herrington (Animals Affect Habitats, weavers) * Anton-Burakov (Computer Programming and Code), (Debugging) * ArtPower (Primary Colors) * AstroStar (Astronomers) * Backgroundy (Digital Devices, girl studying) * benjikat (Multiplication), (Soil as Material, girl digging), (Telephone) * BlackBoxGuild (Marine Biologists), (Valleys) * Blue Ice (Snow) * Bradley TV (Temperature, liquid) * branislavpudar (What are Natural Resources, food production) * BublikHaus (Seas, sailing) * Calin Daec (Caves, man in cave) * Callysea Stock (Oceans, whale) * CGBear (Loops) * ChameleonsEye (Pulleys, elevator) * Chipleader1 (Lightning and Thunder) * ChrisMVisuals (Fall Weather) * Chromavid (Squares) * Cienpies Design (Fiber Arts) * Clever Arts (Food Chains Webs, bunny) * CLIPAREA Custom media (Circulatory, veins), (Rectangles) * crbellette (Apple Harvest) * Dan Benson (Tornadoes, damage), (Wedges, chop wood) * Daniel Schreiber (blizzards) * Danis Kozlov (Bacteria) * DarkMediaMotion (Length) * Darren M Green (Gulfs) * DC Studio (Chemists) * DeadMeat (Levers, wheelborrow), (Pyramids), (Pyramids) * decade3d-anatomy online (What are Germs) * Denis Saraginovski (Fruits and Seeds, farmer) * Derinmedia (Finding and Sharing Information, boy globe) * Dessirae Scarborugh (Adaptations, Chameleon) * Dimarion (Cells, single cell animal) * Discovod (Ocean Plants, Coral Reef) * Dizzy_Studio (Compasses) * donner sens - make sense (Hard or Soft, tomato) * DOTV (Asking Questions, penguins) * DPS (Lets Investigate, baby birds) * Dr. Morley Read (Flowers, butterfly on flower) * dualstock (Exercise), (Science and Math, fashion) * Egoreichenkov Evgenii (Food Scientists) * Ethan Daniels (Group Behavior, fish) * Eugene Sergeev (Hot or Cold, fire burning) * Faraways (Floating and Sinking, cargo ship) * Fedor A. Sidorov (Inclined Planes, roller coaster) * figu (Lakes, frog) * FILMKLAUS (Smooth Rough, ice skating) * fizkes (Digital Footprint) * Flystock (Conifers, winte scene) * Food Lovers (Wedges, tomatos) * Francois Arseneault (Plants in Fall, combine), (Winter Weather) * Fredy Thuerig (About Cold Weather), (Volcanoes, eruption), (Volcanoes, lava flow) * fStopimages (Rain Forest Plants, rainforest) * Gentoo Multimedia Ltd. (Grasslands, zebras) * gezzeg (Using Facts, girl drawing) * gimsech (Floating and Sinking, rice water) * Gorodenkoff (Data), (Digital Citizenship, elementary school) * Greene HDTV (Smelling, rabbit) * Greg Reitman (Ocean Plants, kelp forest) * Guliyev (What are Clouds, clouds) * Gulshan Gurbanova (Sculpture, sculptor) * Hoselgnacio (Web Pages) * Hotelfoxtrot (Using Models, architects) * Hotshotstock (Climate, desert) * Iftikhar Alam (Photosynthesis) * Immersion Imagery (Paleontologist, fossil extraction) * INSOMNIA-DREAMS (Deserts, Camel) * Ivan Veselinovic (Plants in Summer) * Jason.Lee (Animals in Winter, Song birds) * Jessica Heim (Camouflage) * JHDT Productions (Telegraphs) * JHDT Stock Images LLC (Wetlands, bird) * Jill Former (Forecasting Weather, anemometer), (Measuring Weather) * jn14productions (Radios) * JTM Stock Video Footage (Seeing, pupil) * Kostyantyn Skuridin (Hot or Cold, freezing window) * Kozorez Vladislav (Respiratory System, xray) * kstock (internet safety, emails) * Labrador Photo Video (Heredity, chickens) * Lilychina (Counting) * Lim ChewHow (Group Behavior, ants) * Longjourneys (Arguments and Opinions, garbage), (Cylinders) * MADDRAT (Touching, pottery) * ManuMata (Deltas) * Marcio Cardoso (Coral Reef) * MarinaGrigorivna (Printing Presses) * markhiggins (Fossils, fish fossil) * Matt Antonio (Animals in Fall, Geese) * Matt Niebuhr (Erosion, cliffs) * Matvii Mosiahin (Earthquakes) * Media Stock Masters (Understanding Media) * MEDIABLIX1 (People in Spring, baseball) * Mel Mar Photo (Temperate Forest, deer) * Memento Stock (Computer Privacy), (Video Games) * meyblume (Polar Plants, tundra vegetation), (Tundra) * mhp (Dew and Forest, spider) * Mikhail Shestov (Levers, scissors), (Pulleys, cranes) * Mizamook (Wheels Axles, tires) * Monkey Business Images (Addition) * Mopic (Cells, cell division) * Mortrek (Roots, radish seeds) * motion.pl (Heavy or Light, beach) * Motortion Films (Cyberbullying) * moveen (Wetlands, Ibera) * Multifocus (Mass and Weight, astronaut) * Multiverse (Sequences) * Narongsak Nagadhana (Using Facts, boy drawing) * NatalexDuo (Screws, drilling) * NAXStock (Stiff or Bendable, climber) * neelsky (Lets Investigate, peacock) * NHNZ Moving Images (Ferns, fern growing) * Niar (Rain, rain over lake) * Nick Fox (What is a Landform) * Noel Powell (Animals Affect Habitats, Beaver) * Occeii (Digestive, digestive system) * Oleh Ibrahimov (Virtual Reality) * Olena Hromova (Secondary Colors, artist) * ollo (Circles) * OR Productions (Conifers, truck driving) * orbitrob (Flower Blossoms, bee flower), (Woodland Plants, snowstorm) * OrlowskiDesigns (Woodland Plants, walking forest) * Pavel L Photo and Video (Finding and Sharing Information, boy with ship), (Nutrition and Diet, food table), (Wheels Axles, clowns on bikes) * Peefay (Covid19) * peter adams (Ferns, waterfall) * PM LBL (Heavy or Light, dump truck) * PR4God (People in Fall, combine) * Pressmaster (Answers and Solutions, girls), (Cubes) * proBakster (Hard or Soft, rock climber) * REC Stock Footage (Sound, guitar) * ReeldealHD (Humans and Earth, beach cleanup) * Regissercom (Shiny or Dull, disco ball) * Rekindle Photo and Video (Density and Volume, balloons), (Inclined Planes, boarding ship) * riccardocova (Skeletal System, skeleton walking) * Rick Ray (Computers), (Forecasting Weather, office), (Penicillin), (Plains), (Rock as Material, climber), (Subtraction), (Telescopes), (What are Animals, giraffes), (What are Humans, painting), (Wildfire biologist, sheep) * Robert Adrian Hillman (Caves, bats) * Rocketclips, Inc. (What is Internet, skype) * Roy Simon (Animals in Winter, deer) * rvdw images (What are Simple Machines) * Ryan M. Bolton (Metric Imperial) * saginbay (Time) * Sascha Janson (Mimicry) * satvchannel (Asking Questions, elephant) * sciencepics (Circulatory, blood vessels), (Endocrine, skeleton system) * Scott Cornell (Food Chains Webs, bird and worm), (Living Nonliving, dog) * Sebastian Kaulitzki (Muscular Systems, tennis player), (Nervous System, how they work) * Sergey Krasnoshchokov (Rock as Material, lava flow) * Sergey Shubin (Shiny or Dull, elephant) * SevArt (Arguments and Opinions, puppy and kitty) * SibFilm (Robotics) * SJ Travel Photo and Video (Sand Dunes) * skyfotostock (Leaves, leaf detail) * Slavnaja (Nervous System, body) * SmileLover (Black, White and Gray) * Snaprender (What is Earth, earth from space) * Spotmatick Ltd. (People in Summer, kids at pool), (Xray, doctor xray) * spotmatik (Air), (Cimate, polar region), (Heredity, ethnic family), (What are Natural Resources, wind power) * Starbird Productions (Hurricanes, hurricane winds) * Stefan Gottschild (Erosion, ocean) * Stephane Bidouze (Endangered Threatened Animals, orangutan) * Stock Market Films (Spheres) * Stock4KVideo (Painting) * stockvideofactory (Rocks) * StudioFI (Clocks) * Suzi44 (Using Models, brain) * SVTeam (Wheels) * SynthEx (Computer Securtiy) * Take Photo (Drawing) * TAMIA STUDIO (Windshield Wipers, car) * Tanguy Louvigny (Day and Night, sunset) * The Factory (Screws, lightbulb) * TheStacks (Cones), (Smelling, girl smelling), (Smelling, girl smelling) * Thibault Rouveyrol (Plateaus) * Tim de la Torre (Climate, tropical rain forest) * TP Video (Rivers, Bear) * TravelTelly (Grassland Plants, wildfire) * Trzmiel (Prisms) * Uberstock (Skip counting) * UGREEN 3S (Endocrine, adrenal glad), (Viruses) * Ulrich Willmunder (Flower Blossoms, flower open) * under water (Lakes, bass in lake) * USBFCO (Adaptations, Prairie Dogs) * V75 (Algorithms) * Valery Shanin (Glaciers, aerial view) * VE.Studio (Environmental Scientists) * Veniamin Kraskov (Touching, boy fountain) * VIA films (Computer Hardware) * VIA films (Meteorologist), (Rivers, rafting), (Skeletal System, basketball), (Stiff or Bendable, bouncing), (What are Humans, girls) * VideoFort (Polar Plants, caribou) * Vizavi (Wildfires, fire) * Vladimir Nikulin (Soil as Material, worm) * WGBH Educ. Foundation (Living Nonliving, eggs), (Roots, sunflower) * William Ju (Place Value) * Wolfgang Amri (Photography) * workwithnature (flowering plants, bee on flower) * zelwanka (Humans and Earth, landfill) * ZygiStudio (flowering plants, blooming flower), (Flowers, growing flower), (Stems and Trunks, wheat growing) * ThoughtEquity (Animals in Summer, Bear cubs), (Avalanches, mountain avalanche), (Day and Night, earth rotate), (Ice Hail and Sleet, sleet on metal), (Rain, Orangutan in tree), (Tornadoes, tornado), (Venus, planet rotating) @h6 PGO Social Studies Videos [b] Alamy Videos: [/b] * Pond5 (Georgia), (Petra), (Wyoming) [b] Associated Press Videos: [/b] * Associated Press (The 1621 Harvest Celebration) * Louisiana Department of Wildlife and Fisheries (Louisiana) * Newsroom Ready (Guam) [b] Capstone Press Videos: [/b] * Capstone Press (How PGO articles are Made) [b] Corbis Videos: [/b] * Corbis (Physical Maps) [b] Getty Images Videos: [/b] * Getty Images (1000 black girl books) * Aerial Filmworks (Burj Khalifa), (What is a State), (Yukon) * Aerial HD Stock LLC (Coast Guard), AFPTV (Michigan) * Albert Damanik (Wesak) * Alex Potemkin (New Jersey) * Anadolu Agency/Footage (Human Migration), (Nowruz), (Working Past and Present) * Archive Films (Martin Luther King Jr. Day) * ASAP Creative (Passover) * BlackLight Films - Louie Schwartzberg (Kentucky) * Bloomberg Video – Footage (Capitol), (How Bicycles are Made), (How Books are Made), (How Chocolate is Made), (How Smartphones are Made), (How Sneakers are Made), (Money in Canada) * Brandon Ivey (Kansas) * Brian Craig (Malala Fund) * CCTV+ (Mid Autumn Festival) * David Degen (Maine) * Discovery Access (Postal Workers) * Drew Angerer (Patriot Day) * FatCamera (Pharmacists), (What is a Disability) * FedNet (Congress) * fstop123 (What is Social Action) * Grinberg, Paramount, Pathe Newsreels (Farming Past and Present), (Learning Past and Present) * Hal Bergman (Washington), (Oregon) * Halcyon Days (Sportsmanship) * Hearst Newsreel (Voting) * Image Bank Film (Blindness), (Day of the Dead), (Games around the World), (Saving Water) * Signature (Kwanzaa), (Adoptive Families), (What is Money) * Imazins (Northern Mariana Islands) * iStockfootage (Earning Money) * jamenpercy (Northern and Southern Lights) * Jeremy Hogan (Indigengous People) * jimfeng (Victoria Day) * lechatnoir (Restaurant Workers) * machdas (How Toilet Paper is Made) * MacNeil/Lehrer (Librarians), (Making choices) * Mario Tama (Vaisakhi) * MJ_Prototype (British Columbia) * Nexstar - WGN, Chicago (Homes Past and Present), (Easter) * Nuray Pictures – Footage (How Crayons are Made) * NurPhoto Footage (National Day of Truth and Reconciliation) * Onyx Media, Llc–Footage (Racial Segregation) * Paul Henschel (Minnesota) * perinjo (Units of Time) * Phil Walter (Global Climate Strike) * Pichunter (Vermont) * Posnov (Nunavut) * pronto8000 (Rosh Hashanah) * R.M. Nunes (Quebec) * Reflex Technologies (Treaties) * Rian Maelzer (Families Past and Present) * Roberto Machado Noa (Canada Day) * RoschetzkyIstockPhoto (Texas) * Ryan Pyle (New Brunswick) * Scripps - WPIX, New York (Immigration) * Simonkr (CN Tower) * Smithsonian (Iowa), (New Hampshire), (North Carolina) * Sony Pictures Entertainment (Using a Map Grid) * Steve Nehf (Governor) * Tanaonte (Cooking Past Present) * The March of Time (Clothing Past Present) * Time Image (Transportation Past and Present) * Toshio Sasaki – Footage (Thanksgiving) * Tribune Broadcasting- Anna Burkart (Cinco de Mayo) * ugurhan (Composting) * Ultima_Gaina (Wisconsin) * Xinhua News Agency (Health Past and Present) * Yellow Dog Productions Inc. (Courts) * Yongyuan Dai (Trade) [b] Independence National Historical Park Videos: [/b] * Independence National Historical Park (Liberty Bell) [b] iStockphoto Videos: [/b] * iStockphoto ansolovei (Foster Families) * AvailableLight (Deafness) * benlynn (In My Neighborhood) * Caiafilm (Using Leg Braces) * cloudburst79 (Dyslexia) * colematt (Cousins) * Jason Field (Bald Eagle) * morganl (Hanukkah), (Nurses), (Teachers) * multifocus (Volunteering) * ozgedemirci (ADHD) * PurpleVideos (Goods and Services), (Juries) * RGtimeline (Farmers) * simonkr (Living in the Mountains), (Tolerance) * Thomas Corn (Columbia) * thomasd007 (Courage) * vgajic (Cooperation) [b] Karon Dubke Videos: [/b] * Capstone Publishers (Pledge of Allegiance) [b] Macomb Country Bar Foundation and Sterling Heights Television Videos: [/b] * Macomb County Bar Foundation and Sterling Heights Television (Constitution Day) [b] NARA Videos: [/b] * NARA (Leadership) [b] NARSA Videos: [/b] * NASA (North America on Maps), (Topographic Maps) * Ken Glover (American Flag) [b] Newscom Videos: [/b] * Newscom/Reuters (Autism), (Christmas), (Diwali), (Lunar New Year), (Presidents Day), (Valentines Day) [b] NOAA Videos: [/b] * NOAA (Oceans on Maps) [b] Pond5 Videos: [/b] * pond5 AchimHB (Living in a Polar Region) * beeto (Consumers and Producers) * Burlingham (Saving Energy) * chris_wsw (Living in a Rain Forest) * egleye (US Landforms on Maps) * emmanuelc (Cleaning up Litter) * holtocw (Respect), (Using Wheelchairs) * ImageSource (Birthdays Around the World) * jasonprisk (Veterans Day) * KingWu (Garbage Collectors) * kk5hy (Doctors) * raywoo (Responsibility) * sheyno (Brothers and Sisters) * Starbirdprod (Living on an Island) * WorldViewImages (Food around the World), (School around the World) * yatmaca (In my World) [b] Shutterstock Videos: [/b] * Shutterstock 4kclips (Ireland), (United Kingdom) * AAR Studio (Big Ben) * Aerialworks USA (Connecticut), (Maryland) * AevanStock (Prince Edward Island), (Washington DC) * Alena Mozhjer (Living in a Suburb) * Alexander Khitrov (South Korea) * AlexDrone (Mongolia), (The Moscow Kremlin) * Andrey Armyagov (Norway) * AnnaStills (What Are Family Traditions) * AOP AndreasOttProjects (Guinea) * armando Costantino (What is Culture) * arturasker (Spain) * arun sambhu mishra (Eid al-Fitr) * ATGimages (Trains) * Awais khan (Pakistan) * azuri (Argentina) * BalaganStock (Ethiopia) * BeemFlights (Mali) * Benozaur (Africa) * BigfootHD (Shopping around the World) * BigRoloImages (Antarctica), (Libya) * BlackBoxGuild (Amazon River), (American Samoa), (Arkansas), (Cameroon), (Ecuador), (Manitoba), (Nebraska), (Northwest Territories), (Paricutin), (Protests), (Puerto Rico), (South Dakota), (Sudan), (Tennessee), (US Virgin Islands), (Victoria Falls) * Bob Houghton (New Mexico) * Born Ready Films (Missouri) * BradenRomano (Colorado) * branislavpudar (Living on the Plains) * Bulat.Iskhakov (Eiffel Tower) * buteo (Bolivia) * ByDroneVideos (Rio de Janeiro Harbor) * ChameleonsEye (Transpotation around the World) * chromadreamcoat (What is a Map) * Colin McKeown (Tanks) * Dan_Jesperson (Airplanes), (State Legislature) * Daniel Schreiber (Iceland) * Delta Charlie (Haiti) * Denis Saraginovski (In My State) * DGLimages (Down Syndrome) * DiamondDallas (Air Force) * Dmitriy Kalinin (Vietnam) * Dmitry Chulov (Bangladesh) * Dominik Suplata (Madagascar) * DonaldBowers (St. Patrick’s Day) * Doug Jensen (Florida) * dream_one (Dentists) * dualstock (Child Care Workers), (Cuba) * eFesenko (Iran) * Elizavata Galitckaia (History of Money) * ExpediTom (Chile), (Living in a Desert) * Exroy (Fighter Planes) * Felix Mizioznikov (Massachusetts) * Fevziie (Eid al-Adha), (Loans), (Ramadan) * fivepointsix (Nigeria) * Flow Motion Aerials (Greenland) * Flystock (Cars), (Easter Island), (Kenya) * Frame Stock Footage (Weather Maps) * GagliardiPhotography (Idaho) * Geobor (Painters) * GHProductions (North Korea) * GLF Media (Greece) * gonin (What is a Continent) * Gorgev (Plumbers) * Gorodenkoff (Drones) * GroanGarbu (What is a Petition) * guillaumelynn (Mississippi), (North Dakota) * Gustavo Frazao (South America) * Hangtime Media (West Virginia) * Hmong Windows (Hmong New Year) * ifs (What is a Country) * IgorZh (Turkey) * Ikpro (Cambodia) * ImAAm (What is a Landmark) * Impetus Photo (Striking and Picketing) * InFocusVideo (Electricians) * Ingus Kruklitis (Syndey Opera House) * Iryna Kalamurza (Ukraine) * ItalyDrones (The Roman Coliseum) * iVolta (Ghana) * Jake Sorensen (Nova Scotia) * jamesdeanny (In My Continent) * Jesperson Productions (Memorial Day) * JHDT Stock Images LLC (Veterinarians) * John Theodor (Yom Kippur) * Jonathan Butler (Newfoundland and Labrador) * Jose Gil (Clothing Around the World), (Columbus Day) * JSvideos (Buses) * justit (Jordan) * k49red (Taxes) * Kalamurzing (Denmark) * KAMPUS (Retail Workers) * Karol Kozlowski (Brazil) * knot9.com (What is Identity) * Kostiantyn Batylchuk (Rhode Island) * LifePixStudio (Seregeti National Park) * Live Fire Inc (Afghanistan) * Losevsky Photo and Video (Aunts and Unlces), (Caring for Nature) * Luke Maximo Bell (South Africa) * Lynn Media Global (Great Wall of China), (Virginia), LynnMedia (Peru) * Mamat Suryadi (Islamic New Year) * Manamana (China) * Maridav (New Zealand) * Marinaccio (Civil Rights) * Maykova Galina (Luxembourg) * Methat Somboon (Japan) * mirzavisoko (Saudi Arabia) * Monkey Business Images (Grandparents), (Patriotism) * motion.pl (Timelines) * Mount Airy Films (Egypt) * Multifocus (City Council) * murkalor (Dominican Republic) * Netrun78 (Time Zones) * New Vision Media Inc (Ohio) * Nicholas Courtney (Alabama) * Nick Fox (Saskatchewan) * Nimedia (California) * NIMEDIA (New York) * Noel Powell * Schaumburg (Construction Workers), (Living in a City) * NORTHERN IMAGERY (Destroyers) * NOX_studio (Europe), (Switzerland) * OBJM (Syrira) * OlegD (Myanmar) * Open Films (Poland) * Orlowski Designs LLC (Living in a Small Town) * Outside The Set (Venezula) * Paul Bach (Canada) * Paul Frederick (In My Town) * Pavel L Photo and Video (United States of America) * peter adams (India) * Philip Schneider (Navy) * photo_oles (Games and Fun Past and Present) * Pressmaster (Credit), (Halloween) * Pro_Studio (Illinois), (Nevada) * Procyk Radek (Regugees) * purplevideos (Delivery Drivers) * R.M. Nunes (Alberta), (Philippines) * Rawissue (Sweden) * Real Window Creative (Indiana) * ReeldealHD (Same Sex Families) * Rekindle Photo and Video (Liberia), (Living in a Rural Area) * Renata G Marques (Taj Mahal) * Richard Kelly (Firefighters) * Rick Ray (Aircraft Carriers), (Army), (Bicycles), (Democractic Republic of Congo), (Democracy), (Guatemala), (Humvees), (Introducing Past and Present), (Lebanon), (Lincoln Memorial), (Marines), (Montana), (Mount Everest), (Pennsylvania), (President), (Somalia), (Star-Spangled Banner), (Statue of Liberty), (US Constitution) * Rikofly2013 (Iraq) * Ryan E. Walters (Saving Money) * saiko3p (Germany) * Sail Away (Ships) * Santosh Nimbalkar (Holi) * SASER (Grand Canyon) * sauletas (Reusing and Recycling) * sebolla74 (Mexico) * selman urluca (Chad) * Sergey Nemirovsky (Italy) * Sergio Sergo (Portugal) * Silver Lake Studios (Self Discipline) * sirikorn thamniyom (Loyalty) * Sky Rock Media (Arizona) * SkyworksRF (Delaware) * sladkypomaranc (Hawaii) * spotmatik (Blended Families), (In My Country), (In my Home) * Spotmatik Ltd (Australia), (Great Barrier Reef), (North America) * Star Painter Productions (Independence Day) * Starbird Productions (Living Near the Ocean) * Stargate Studios (Alaska) * Stef Hoffer (Asia) * Stephane Legrand (Ontario) * Steven Frame (Mount Rushmore) * Stock_Video (Pride Month) * Syda Productions (Mechanics) * TheRunoman (Algeria) * timestock22 (France) * Tory studio (Thailand) * Transcendental Media (Police Officers) * Travelling Thilo (Jamaica) * Trompinex (Communication Past and Present) * twistah (Homes around the World) * verticalstock (Earth Day) * Vertical Films (El Salvador), (Honduras) * VIA films (Washington Monument) * video lab (Israel) * Vinnikava Viktoryia (United Arab Emirates) * Vive Media (South Carolina) * vzverev (Russia) * wavebreakmedia ltd (Parents) * Wesley Aston (Utah) * YuenWu (Boats) * Zenstrata (Oklahoma) [b] The White House Videos: [/b] * The White House (White House) [b] TMW Media Group Videos: [/b] * TMW Media Group (Map Scales), (Mayor), (Political Maps) [b] US National Archives Videos: [/b] * US National Archives (Declaration of Independence) @h6 PGO Health Videos [b] Getty Images Videos: [/b] * Image Bank Film (Blindness) [b] iStockphoto Videos: [/b] * Akurra (Hearing) * andresr (Eye Doctors) * AvailableLight (Deafness) * Caiafilm (Using Leg Braces) * cloudburst79 (Dyslexia) * Constantinis (Sun Safety) * Eraxion (Muscular System) * fstop123 (Harzards on the Playground) * kali9 (Having Surgery) * morganl (Nurses) * ozgedemirci (ADHD) * pixelfusion3d (Personal Space) * real444 (How to be Organized) * SDI Productions (Hazards at School) * simonkr (EMT’s) * SolStock (School Counselors) * vgajic (Cooperation) * Wavebreakmedia (Headaches) [b] Newscom Videos: [/b] * Newscom/Reuters (Autism) [b] Pond5 Videos: [/b] * holtocw (Using Wheelchairs) * kk5hy (Doctors) [b] Shutterstock Videos: [/b] * Aila Images (Influenza) * Alila Medical Media, (Bladder), (Digestive System), (Hearing), (Respiratory Systems), (Seeing) * all_about_people (Dairy) * Anderson Ross Production (Occupational Therapists) * Andrii Oleksiienko (Bruises) * ANURAK PONGPATIMET (I Feel Calm) * ArtFamily (Car Safety) * benjikat (Fire Safety), (Types of Bullying) * BigFootSLV (Healthy Snacks) * biggunsband (Dental Hygienists) * bitt24 (Fiber) * BlackBoxGuild (Cerebral Palsy), (Water Safety) * CabbageVP (Common Cold) * CactusVP (What Are Feelings and Emotions) * CGN089 (Allergies) * Chad Stembridge (Calling 911) * cheapbooks (I Feel Worried), (What is Emotioanl Abuse) * Cinematic Storm Footage (Severe Weather Safety) * cinematri (Getting a Shot) * CLIPAREA l Custom media (Circulatory System) * CreativeZone (Fruits), (Hygiene), (Junk Food) * d13 (I Feel Excited) * damseremie (Hiccups) * decade3d-anatomy online (Liver), (What are Germs) * Denis Tabler (Medicine) * Derinmedia (First Aid) * DGLimages (Down Syndrome) * DONOT6_STUDIO (When you Cough and Sneeze) * dream_one (Dentists) * dualstock (Anxiety), (Empathy), (Exercise) * earslan77 (Stomach) * Ekaterina Vidyasova (Pink Eye) * Elena5D (Head Lice), (Scoliosis) * Filipe Frazao (I Feel Happy) * fizkes (Depression), (Eating Healthy), (Grains), (Peer Pressure), (Vegetables) * fotosaga (Dressing for the Weather) * Gorodenkoff (Self Worth), (Technology and My Health) * Greene HDTV (Smelling) * Grenar (Scrapes and Scratches) * Happy Together (Being Responsible) * Iakov Filimonov (Communication) * Ievgen Tytarenko (Pollution and My Health) * In Green (Fats) * ivandan (Sunburn) * jamesteohart (Setting Goals) * jesterpop (Hazard at Home) * JHDT Productions (Earaches) * John Neff (Getting an X-Ray) * Kasintsev Vladislav (Sleep Habits) * Kodox Films (Focus Your Attention) * Kostiantyn Batylchuk (Bike Safety) * Kozii Sergii (Food Posioning), (Sprains and Strains) * Kozorez Vladislav (Respiratoy System) * lakshmiprasada (Physical Distancing) * MADDRAT (Touching) * MadiGraphic (Concussions) * manaemedia (Physical Therapists) * Marina Vorobyeva (I Feel Angry) * Monkey Business Images (Being Mindful), (How to Handle Stress), (Manners), (Planning Meals), (Relationships and my Health), (School Bus Safety), (Setting Routines) * Motortion Films (I Feel Sad), (Standing up for a friend) * mvik2909 (Saying No) * My Agency (Self Concept) * Nataliia Unhurianu (Making New Friends), (What is Physical Abuse) * Occeii (Digestive System), (Intestines) * ohhi (Broken Bones) * Pakistan Stock Footage (What is Verbal Abuse) * Pavel L Photo and Video (Self Confidence) * Petrushin Evgeny (Speech Therapists) * photo_oles (Bronchitis) * photopixel (Food Safety) * picmedical (Salvia) * PR Image Factory (Getting a Checkup) * Pressmaster (Acceptance), (Tasting) * riccardocova (Skeletal System) * Rick Ray (Pedestrian Safety) * sciencepics (Brain), (Circulatory System), (Endocrine System), (Kidneys), (Lungs), (Skin) * Scott Cornell (Making Decisions) * Sebastian Kaulitzki (Muscular System) * Sellwell (Poision Control) * SergeyPerm74 (Stranger Safety) * Silver Lake Studios (Self Discipline) * Slavnaja (Nervous System) * Soloviov Vadym (Protein) * spotmatik (Tasting) * Star Stock (Getting a Cavity Filled) * Stock Market Films (Motivation) * Stockbusters (Face Coverings), (I Feel Scared) * stockvideofactory (Self Control) * Syda Productions (Teamwork) * T.Photo (Mucus) * TheStacks (Smelling) * Tomsickova Tatyana (Weather and My Health) * UGREEN 3S (Endocrine System) * Vadim Zakharishchev (Cystic Fibrosis), (What to Do if you get Lost) * Veniamin Kraskov (Touching) * VIA films (Body Image) * volkan Arslan (Heart), (Immune System) * Volodymyr Maliovanyi (Diabetes) * wavebreakmedia (Dehydration), (Media and My Health), (Posture), (Standing up for yourself), (Vaccines), (Water and My Health), (What is Bullying), (What is Substance Abuse) * wissanustock (Getting a Tooth Pulled) * worawit_j (Obesity) * ZNAYMERU (Asthma) @h4 PebbleGo Spanish A highly qualified team of experts in the Spanish language translated the PebbleGo text into Spanish. Trusted Translations, an authority in Spanish translation services, has worked extensively to find the best in Spanish-language translators. The translations were triple-verified: first by a translator, then an editor, and then finally, after audio-recording, the audio was reviewed for pronunciation and quality. All articles were translated contextually. This is important because, for example, in Spanish, animal terms can vary depending on the animal’s gender and age, whereas in English, the same term is used. All of the audio was recorded by professional voice over artists who are native Spanish speakers. @h4 PebbleGo and PebbleGo Next Content Consultants * [b] Shane Asselstine[/b] - Technology Integration Specialist for the Hawaii Department of Education * [b] Dr. Matt Avey[/b] - Curriculum & Instruction - Lincoln Public Schools, Curriculum Specialist K-12 Health & Physical Education * [b] Amber Chandler[/b] - National Board Certified Early Adolescent English teacher, Curriculum and SEL Consultant to Thomas B. Fordham Institute, 3-time awardee of the NoVo Foundation SEL in Action Grant and recipient of Teaching Tolerance Classroom grant, Author of The Flexible Social Emotional Classroom and The Flexible ELA Classroom * [b] Dr. Jennifer Johnson[/b] - Instructor, Mayo Clinic College of Medicine, Department of Family Medicine * [b] Jacqueline Jorgensen, BSN, RN[/b] * [b] Hannah Koronkiewicz, MS, CCC-SLP/L[/b] - Assistant Director, Early Childhood and Social Media, PPA Oak Lawn | Lombard Clinic * [b] Kailey Ledo, P.A.-C.[/b] - Emergency Medicine, Mayo Clinic Health System * [b] Dr. Katrina Phillips[/b] - Member of the Red Cliff Band of Lake Superior Ojibwe, Professor at Macalester College * [b] Cailey Priem, M.Sc.[/b] - Associate Head Athletic Trainer, Minnesota State University, Mankato * [b] Mathew Wedel[/b] - Paleontologist, Associate Professor at Western University of Health Sciences