| What’s the Big Idea, Ben Franklin? | Fritz, Jean | | Fourth Grade, |
| Whatever Happened to Janie? | Cooney, Caroline B. | | Secondary, |
| Whatshisface | Korman, Gordon | | Fifth Grade, |
| Wheat Doll, The | Randall, Alison | | Second Grade, |
| Wheel on the School, The | DeJong, Meindert | | Sixth Grade, |
| When Dinosoars Came with Everything | Broach, Elise | | First Grade, |
| When I Get Bigger | Mayer, Mercer | Little Critter | Kindergarten, |
| When I Was Five | Howard, Arthur | | First Grade, |
| When Jessie Came Across the Sea | Hest, Amy | | Third Grade, |
| When Lightning Comes in a Jar | Polacco, Patricia | | Third Grade, |
| When Mermaids Sleep | Bonwill, Ann | | Kindergarten, |
| When Mischief Came to Town | Nannestad, Katrina | | Fourth Grade, |
| When Pigs Fly | Burks, James | | Kindergarten, |
| When Sparks Fly: The True Story of Robert Goddard, the Father of US Rocketry | Fulton, Kristen | | Second Grade, |
| When the Sea Turned to Silver | Lin, Grace | | Fourth Grade, |
| When the Soldiers Were Gone | Propp, Vera W. | | Third Grade, |
| When Will This Cruel War Be Over? (Dear America) | Denenberg, Barry | Dear America | Fifth Grade, |
| When Winter Comes | Van Laan, Nancy | | Kindergarten, |
| When You Reach Me | Aardema, Verna | | Sixth Grade, |
| When Zachary Beaver Came to Town | Holt, Kimberly Willis | | Fourth Grade, |
| Where Are the Galapagos Islands? | Stine, Megan | Where Is? | Fourth Grade, |
| Where are the Great Pyramids? | Hoobler, Dorothy | Where Is? | Fourth Grade, |
| Where Did My Clothes Come From? | Butterworth, Christine | | Third Grade, |
| Where do Polar Bears Live? | Thomson, Sarah L. | Let's-Read-and-Find-Out Science; Stage 2 | Second Grade, |
| Where Do Puddles Go? | Robinson, Fay | | Second Grade, |
| Where Do You Think…Columbus? | Fritz, Jean | | Fourth Grade, |
| Where Is Alcatraz? | Medina, Nico | Where Is? | Fourth Grade, |
| Where Is Mount Everest? | Medina, Nico | Where Is? | Fourth Grade, |
| Where is Mount Rushmore? | Kelley, True | Where Is? | Fourth Grade, |
| Where Is Niagara Falls? | Stine, Megan | Where Is? | Fourth Grade, |
| Where Is Stonehenge? | Kelley, Truev | Where Is?c | Fourth Grade, |
| Where Is the Amazon? | Fabiny, Sarah | Where Is? | Fourth Grade, |
| Where Is the Brooklyn Bridge? | Stine, Megan | Where Is? | Fourth Grade, |
| Where is the Colosseum? | O'Connor, Jim | Where Is? | Fourth Grade, |
| Where Is the Eiffel Tower? | Anastasio, Dino | Where Is? | Fourth Grade, |
| Where Is the Empire State Building? | Pascal, Janet B. | Where Is? | Fourth Grade, |
| Where is the Grand Canyon? | O'Connor, Jim | Where Is? | Fourth Grade, |
| Where Is the Great Barrier Reef? | Medina, Nico | Where Is? | Fourth Grade, |
| Where Is the Great Wall? | Demuth, Patricia | Where Is? | Fourth Grade, |
| Where Is the Parthenon? | Edwards, Roberta | Where Is? | Fourth Grade, |
| Where Is the Taj Mahal? | Hoobler, Dorothy | Where Is? | Fourth Grade, |
| Where Is the White House? | Stine, Megan | Where Is? | Fourth Grade, |
| Where the Forest Meets the Sea | Baker, Jeannie | | First Grade, |
| Where the Mountain Meets the Moon | Lin, Grace | | Fourth Grade, |
| Where the Red Fern Grows | Rawls, Wilson | | Sixth Grade, |
| Where the Sidewalk Ends | Silverstein, Shel | | Fourth Grade, |
| Where the Wild Things Are | Sendak, Maurice | | First Grade, |
| Where to Puddles Go? | Robinson, Fay | | Third Grade, |
| Where was Patrick Henry…May? | Fritz, Jean | | Fourth Grade, |
| Which Witch | Ibbotson, Eva | | Fifth Grade, |
| Which Witch is Which? | Barrett, Judi | | First Grade, |
| While the Clock Ticked | Dixon, Franklin W. | Hardy Boys, The | Fourth Grade, |
| Whipping Boy, The | Fleischman, Sid | | Third Grade, |
| Whirligig* | Fleischman, Paul | | Secondary, |
| Whirlwind World of Hurricanes with Max Axiom, Super Scientist, The | Krohn, Katherine | Graphic Science | Third Grade, |
| Whispering Statue, The | Keene, Carolyn | Nancy Drew Mystery Stories | Fourth Grade, |
| Whistle for Willie | Keats, Ezra Jack | | First Grade, |
| White Fang | London, Jack | | Secondary, |
| White Mountains, The | Christopher, John | | Secondary, |
| White Water! | Maloney, Brenna | National Geographic Kids: Chapters | Fourth Grade, |
| White Wolf, The | Roy, Ron | A to Z Mysteries (original); 23 | Third Grade, |
| Who Am I?: An Animal Guessing Game | Jenkins, Steve | | Kindergarten, |
| Who Eats What?: Food Chains and Food Webs | Lauber, Patricia | | Third Grade, |
| Who Is Pele? | Buckley Jr., James | Who was? | Fourth Grade, |
| Who Is Pope Francis? | Spinner, Stephanie | Who Is? | Fourth Grade, |
| Who Lives in an Alligator Hole? | Rockwell, Anne F. | Let's-Read-and-Find-Out Science; Stage 2 | Second Grade, |
| Who Said Red? | Serfozo, Mary | | Kindergarten, |
| Who Sank the Boat? | Allen, Pamela | | Kindergarten, |
| Who Says Women Can’t Be Doctors: The Story of Elizabeth Blackwell | Stone, Tanya Lee | | Second Grade, |
| Who Wants a Tortoise? | Keane, David | | Kindergarten, |
| Who Wants to Be a Princess?: What It Was Really Like to Be a Medieval Princess | Heos, Bridget | | Second Grade, |
| Who was Abigail Adams? | Kelley, True | Who Was? | Fourth Grade, |
| Who Was Abraham Lincoln? | Pascal, Janet | Who Was? | Fourth Grade, |
| Who Was Albert Einstein? | Brallier, Jess M. | Who Was? | Fourth Grade, |
| Who was Albert Einstein? | Brallier, Jess M. | Who Was? | Fourth Grade, |
| Who was Alexander Graham Bell? | Bader, Bonnie | Who Was? | Fourth Grade, |
| Who Was Amelia Earhart? | Jerome, Kate Boehm | Who Was? | Fourth Grade, |
| Who was Annie Oakley? | Spinner, Stephanie | Who Was? | Fourth Grade, |
| Who was Babe Ruth? | Holub, Joan | Who Was? | Fourth Grade, |
| Who was Betsy Ross? | Buckley, James, Jr., 1963- author. | Who Was? | Fourth Grade, |
| Who was Charles Darwin? | Hopkinson, Deborah | Who Was? | Fourth Grade, |
| Who was Charles Dickens? | Pollack, Pam | Who Was? | Fourth Grade, |
| Who was Christopher Columbus? | Bader, Bonnie | Who Was? | Fourth Grade, |
| Who Was Clara Barton? | Spinner, Stephanie | Who Was? | Fourth Grade, |
| Who was Claude Monet? | Waldron, Ann | Who Was? | Fourth Grade, |
| Who was Daniel Boone? | Kramer, Sydelle | Who Was? | Fourth Grade, |
| Who was Davy Crockett? | Herman, Gail | Who Was? | Fourth Grade, |
| Who was Dr. Seuss? | Pascal, Janet B. | Who Was? | Fourth Grade, |
| Who was Eleanor Roosevelt? | Thompson, Gare. | Who Was? | Fourth Grade, |
| Who was Ernest Shackleton? | Buckley, James | Who Was? | Fourth Grade, |
| Who Was Ferdinand Magellan? | Kramer, Sydelle | Who Was? | Fourth Grade, |
| Who was Franklin Roosevelt? | Frith, Margaret. | Who Was? | Fourth Grade, |
| Who was Galileo? | Demuth, Patricia | Who Was? | Fourth Grade, |
| Who was Gandhi? | Rau, Dana Meachen | Who Was? | Fourth Grade, |
| Who was Genghis Khan? | Medino, Nico | Who Was? | Fourth Grade, |
| Who was George Washington Carver? | Gigliotti, Jim | Who Was? | Fourth Grade, |
| Who Was George Washington? | Edwards, Roberta | Who Was? | Fourth Grade, |
| Who was Harriet Beecher Stowe? | Rau, Dana Meachen | Who Was? | Fourth Grade, |
| Who Was Harriet Tubman? | McDonough, Yona | Who Was? | Fourth Grade, |
| Who was Helen Keller? | Thompson, Gare | Who Was? | |