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- Light, by Cody Crane
- The moon, by Cody Crane ; content consultant Kevin Manning, Astronomer ; reading consultant Jeane M. Clidas, Ph.D., Reading Specialist
- Sound, by Cody Crane
- The stars, by Cody Crane
- Heating and cooling, by Cody Crane
- Simple machines, Cody Crane
- Earth, by Cody Crane
- The Sun, by Cody Crane
- Matter, by Cody Crane
- Light, by Cody Crane
- The moon, by Cody Crane ; content consultant Kevin Manning, Astronomer ; reading consultant Jeane M. Clidas, Ph.D., Reading Specialist
- Sound, by Cody Crane
- The stars, by Cody Crane
- Heating and cooling, by Cody Crane
- Simple machines, Cody Crane
- Earth, by Cody Crane
- The Sun, by Cody Crane
- Matter, by Cody Crane