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One Source.
A World of Information.

Photo Credits

Grade K


Helping Hands ©Blend Images/Superstock


Curious George: Curious About Jobs: ©kali9/

Friendship: ©bowdenimages/

On the Job: ©AtnoYdur/


Imagine It ©Jim Craigmyle/Corbis


Curious George: Curious About Transportation: ©FOTOG/Tetra Images/Alamy

Write a Poem: ©Juriah Mosin/Shutterstock

Shapes Geometry: ©Houghton Mifflin Harcourt


Nature’s Wonders ©Studio DL/Corbis


Search the Night Sky: ©David M. Schrader/Shutterstock

Shutterbugs Wiggle and Stomp: ©bzamora/

Underwater Hiding Places: ©ArnonPolin/


The World to Explore ©Erin Hogan/Photodisc/Getty Images


Mountain Face-Off: ©Corbis

How to Shake Hands with an Octopus: ©Juniors Bildarchiv/Alamy

The Environment: ©Digital Vision/Alamy


As We Grow ©Ariel Skelley/Corbis


Farm to Fork: ©James P. Blair/Photodisc/Getty Images

Animal Families: ©kmartin457/

Measure Yourself: ©Todd Wright/Blend Images/Alamy


Do Your Best ©Jose Luis Pelaez/Getty Images


The Playground Is for Everyone: ©Rpsycho/

Curious About Me Scrapbook: ©Stockdisc/Getty Images

Make the Healthy Choice: ©AGRICCO/Alloy/Corbis


Grade 1


Around the Neighborhood ©Pressmaster/Shutterstock


Build A Neighborhood: ©AlenaSalanovich/

The Neighborhood: ©Houghton Mifflin Harcourt

Meet My Family: ©Claudia Paulussen/Fotolia


Sharing Time ©Hiya Images/Corbis


Animal Talk: ©johan63/

Cloud Dreamer: ©Corbis

Writers Speak to Kids: Mo Willems: ©Luis Molinero/Shutterstock


Nature Near and Far ©belizar/Shutterstock


Create a Living Jungle: ©Vladimir Melnik/Fotolia

A Tale of Two Dolphins: ©Doug Norman/Alamy

The Cactus Hotel: ©Frank Bach/Cutcaster


Exploring Together ©Jupiterimages/Getty Images


Why Do We Explore?: ©Nick Clements/Digital Vision/Getty Images

Marine Biologist: ©JUPITERIMAGES/Comstock Images/Alamy

How to Build a Rocket and Think Like an Engineer: ©NASA


Watch Us Grow ©Rob Marmion/


Butterfly Life Cycle Game: ©Don Hammond/Design Pics/Corbis

From Seed to Flower: ©Mikael Damkier/Fotolia

Meet the Kids: ©Getty Images/iStockphoto


Three Cheers for Us! ©Rawpixel/Shutterstock


Kids in Action: ©Houghton Mifflin Harcourt

Making the Most of Your Moment: ©Bigshots/Digital Vision/Getty Images

Who Am I?: ©Houghton Mifflin Harcourt


Grade 2


Neighborhood Visit ©13/Tony Anderson/Ocean/Corbis


A City Rap: ©william87/

Dogs at Work: ©2/Don Farrall/Ocean/Corbis

Yes… That’s Bullying: ©szefei/


Nature Watch ©Patrick Orton/Aurora Open/Corbis


Star Parties: ©sNike/Shutterstock

A City in the Forest: ©KenCanning/

My Submarine Ocean Explorer: ©johnandersonphoto/


Tell Me About It! ©Christopher Futcher/


Instrument Garden: ©Getty Images

Cleopatra Finds Her Voice: ©ewg3D/

San Francisco’s Kei Lun Lion Dancers: ©hanhanpeggy/


Heroes and Helpers ©Stokkete/Shutterstock


Pit Bull’s Lick Saves Deaf Teen from Fire: ©arturasker/Shutterstock

Presidents’ Day: All About the Holidays: ©Houghton Mifflin Harcourt

Justice for All: ©Everett Historical/Shutterstock


Changes, Changes Everywhere ©Rita Kochmarjova/Shutterstock


Photo Explore: ©Dynamic Graphics/Getty Images

The Sweet Life of Lions: ©Image Source Pink/Alamy

How Do Seeds Sprout?: ©amana images inc./Alamy


What a Surprise! ©Bruce Rolff/Shutterstock


Unusual Suspects: ©Houghton Mifflin Harcourt

Young Inventors: ©Ian Lishman/Juice Images/Corbis

Secret Life of the Serengeti: ©Alan Carey/Corbis


Tips for Reading Informational Texts



Internet Safety Tips 


Grade 3


Good Citizens ©Don Hammond/Design Pics/Corbis


The Power Of One … And Pennies: ©sbeagle/

Interview with Barrington Irving: ©sierrarat/

Batkid Saves The Day!: ©solarseven/Shutterstock


Look and Listen ©Steve Debenport/Getty Images


This Dog Knows 1,000 Words: ©tommy_martin/

Parrot missing for years returns speaking Spanish: ©Richard Susanto/Shutterstock

China creates sidewalk for people who walk and text: ©asiseeit /


Lesson Learned ©Jupiterimages/Exactostock/Superstock


The Little Prince: ©devrimgulsen/Shutterstock

The Natural: ©Dole08/

Food for Thought: ©Andrey_Kuzmin/


Natural Wonders ©Antony Spencer/Vetta/Getty Images


Climbers Clean Up: ©SIHASAKPRACHUM/Shutterstock

Robot Zoo: ©Catherine Yeulet/Getty Images

Pygmy Seahorses: Masters of vibrantly-colored coral camouflage: ©timsimages/Shutterstock


Going Places: ©Smart Creatives/Corbis


World Traveler: ©Nnehring/

A Park That’s Out of This World: courtesy of NASA

I Wanna See the States: ©Houghton Mifflin Harcourt


Make Your Mark ©Image Source/Getty Images


Be a Hummingbird: ©Island Road Images/Alamy

Saving Sloths: ©Kenneth Koh/Adventure Nomad/Flickr/Getty Images

80-Year Old Climbs Mount Everest – Oldest Ever: ©Image Source/Getty Images


Grade 4


Reaching Out ©Leland Bobbé/Corbis


Rosa Parks Was Arrested for Civil Disobedience December 1, 1955: ©National Archives

Michigan Teen Carries Brother For 40-Miles To Raise Cerebral Palsy Awareness: ©sezer66/Shutterstock

Canine MD: Guide Dog Puppies: ©Cylonphoto/Shutterstock


Tell Me More ©Ariel Skelley/Blend Images/Corbis


Gregory Gavin: Visual Arts: ©Christopher Futcher/

Giant rubber duck invades Los Angeles!: ©KleimDesign/

José Limón: ©nico_blue/


Inside Nature ©Niyazz/Shutterstock


Artists in Antarctica: ©thp73/

Arthropods: ©Hans Lang/Imagebroker/Alamy

Call a Family Meeting and Make a Plan!: ©Pressmaster/Shutterstock


Unbreakable Spirit ©erproductions/Leonie Purchas/Corbis


Little League’s Greatest Star: ©Photodisc/Getty Images

Teenager Ethan King Changes Lives, One Soccer Ball at a Time: ©Liquidlibrary/Jupiterimages/Getty Images

Calling Kid Chefs!: ©Jacek Chabraszewski/Shutterstock


Change It Up ©Richard Hutchings/Corbis


Technology Over Time: ©Fotolia

Kid Heroes for the Planet: ©Digital Vision/Getty Images

The History of Football: ©Tetra Images/Alamy


Paths to Discovery ©PHOTO 24/Jupiterimages/Getty Images


Helping Cheetahs Win the Race to Survive: ©Dirk Freder/

Guess How Whales Hear!: ©HAYkan Karlsson/E+/Getty Image

The Hubble Hits 25 Years: ©Photodisc/Getty Images


Grade 5


Meet the Challenge ©


Blind Ambition: ©Stocktrek Images/Getty Images

How to Become President of the U.S.: ©GlowImages/Alamy

What Kids Who Are Moving Should Do: ©LuminaStock/


Wild Encounters ©David Mckee/Shutterstock


Searching for the Spirit Bear: ©LuminaStock/

Leatherback Sea Turtle: ©Scott Benson, NOAA

Burrowing Owl: ©Paulina Lenting-Smulders/


Revolution!: ©Tetra Images/Corbis


The Road to Revolution: ©traveler1116/

Experience the Revolution: ©Susan Law Cain/Shutterstock

Molly Pitcher: An American Heroine: ©Library of Congress Prints and Photographs Division


The Power of Storytelling ©Chris Clor/Blend Images/Corbis


Art That Tells a Story: ©Zoran Karapancev/Shutterstock

Scherherazade The Story of the Thousand & One Arabian Nights: ©PhotoDisc/Getty Images

Writers Speak to Kids: Jeff Kinney: ©Pete Pahham/Shutterstock


Under Western Skies ©


Go West Across America with Lewis & Clark!: Artville/Getty Images

National Cowboy and Western Heritage Museum: ©Corbis

The Ancestral Pueblo People: ©NatalieJean/Shutterstock


Journey to Discovery ©Stocktrek Images/Getty Images


Scientist Profile: Paleontologist: ©jo ingate/Alamy

International Space Station: © Stocktrek Images/Getty Images

Migrations: ©sharply_done/


Internet Safety Tips

©Monkey Business Images/Shutterstock


Reading Tips

©KidStock/Blend Images/GettyImages