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Series
- Sing Hi, Sing Lo42
- Children Growing27
- Driver Education22
- History with Herb Hake22
- Heritage18
- Community of the Condemned16
- Keyboard Conversations15
- Principles of genetics14
- Astronomy for You13
- The Secret of Flight13
- A number of things12
- Design Workshop12
- Once Upon a Japanese Time12
- Last Continent: Antarctica11
- Young Worlds11
- Discovery at Brookfield Zoo9
- Meant for Reading9
- Search for America9
- Survival in the Sea9
- Doctors in Space8