- California Indians
- Call Me American (Adapted for Young Adults)
- Cameos from English History, from Rollo to Edward II
- Caminhos da conquista
- Candy Bomber
- Captain Moonlite
- Captain Starlight
- Captain Thunderbolt
- Cartas a Un Joven Poeta - (Anotado)
- Cattle Trails and Cowboys
- Cause
- Causes of the Civil War: A House Divided
- Chanan and His Violin and other stories
- Chance
- Changing Geography of the 20th Century
- Che Succede?
- Chewing the Cud
- Child Soldier
- Children of the Dust Bowl: The True Story of the School at Weedpatch Camp
- Children’s Scavenger Hunt – Hollywood
- Children’s Scavenger Hunt – London
- Children’s Scavenger Hunt – New York City
- Children’s Scavenger Hunt – Paris
- Children’s Scavenger Hunt – San Francisco
- China's Son
- China: Land of the Emperor's Great Wall
- Chocolate
- Christina's Matilda
- Christopher Columbus
- Chronological Reasoning
- Ciocoii vechi si noi
- City
- City on Ice
- Cités et ruines américaines
- Ciudad quebrada
- Civic Participation
- Civil War Battleship: The Monitor
- Civil War Is Coming
- Civil War Leaders
- Civil War Sub: The Mystery of the Hunley
- Civil Wars in Africa
- Claiming My Place: Coming of Age in the Shadow of the Holocaust
- Clarina Nichols: Frontier Crusader for Women's Rights
- Climbing Everest (Totally True Adventures)
- Code Girls
- Code Makers and Code Breakers
- Code Name Badass
- Code Name Pauline
- Cold War Era
- Colonial Voices: Hear Them Speak
- ColoNOzation
- Treasure Island
- Comparison and Contextualization
- Complete History & Literature of H. E. Marshall
- Comparison and Contextualization
- Complete History & Literature of H. E. Marshall
- Complete Homeschool Science
- Confederate Flag
- Conflict of the Ages Teacher Edition 1-3
- Connecting the 21st Century to the Past: What Makes America America? (2000-the p
- Conspiracy
- Corpses, Coffins, and Crypts
- Cosa de todos los días (Vol. I)
- Cosa de todos los días (Vol. II)
- Cosa de todos los días (Vol. III)
- Courageous Women of the Civil War
- Courageous Women of the Vietnam War
- Crafting Change
- Cramm This Book
- Crash
- Crazy Horse
- Creatures of Ancient Lands
- Creatures of Ancient Seas
- Creatures of Ancient Skies
- Creatures of Today
- Crime Time
- CT and the Big Sioux
- Cum s-a nascut poporul roman?
- Cyrus Field's Big Dream
- Czars and Czarinas