- The digestive system, by Rebecca Pettiford
- The circulatory system, by Rebecca Pettiford
- The skeletal system, by Rebecca Pettiford
- The respiratory system, by Rebecca Pettiford
- The muscular system, by Rebecca Pettiford
- Reindeer, by Rebecca Pettiford
- Solar power, by Rebecca Pettiford
- Green buildings, by Rebecca Pettiford
- Hybrid and electric cars, by Rebecca Pettiford
- Wind power, by Rebecca Pettiford
- The nervous system, by Rebecca Pettiford