| Careers in Personal Space Travel |
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| Careers in Robot Technology |
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| Careers in Self-Driving Car Technology |
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| Careers in Virtual Reality Technology |
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| Careers in Wearable Electronics |
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| Caribou Migration |
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3.6 |
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| Carnivorous Plants |
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| Carpenter |
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5.2 |
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| Cat Claws to Thumbtacks |
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3.6 |
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| Catherine the Great |
New!
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| Cat's Eyes to Reflectors |
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3.7 |
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| Cave |
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| Celebrating Diversity in My Classroom (14 titles) |
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| Celebrating Virtually |
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| Celebrity Campaigns |
Soon!
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| Cell Phones for Soldiers: Charities Started by Kids! |
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| Celtic Tree Astrology |
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| Centralia Mine Disaster |
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| Champs! Inspirational Animals (6 titles) |
Soon!
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| Changing Spaces (8 titles) |
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