Chapter 1 (The Earth)
Education Goes Outdoors by Frank A. Johns, Kurt Allen Liske, and Amy L. Evans. Community resources are used to develop children's awareness of their environment.
Earth Book for Kids: Activities to Help Heal the Environment by Linda Schwartz. Arts and crafts projects, experiments, and activities.

Chapter 2 (Weather and Seasons)
Weather Watch by Valerie Wyatt. Explanations of what makes weather, why it changes, and how it affects people and animals, along with activities for weather-related projects.
Usborne Book of Weather Facts by Anita Ganeri. Facinating facts about the world's weather and climate.

Chapter 3 (The Solar System)
Moon Journals: Writing, Art, and Inquiry Through Focused Nature Study by Joni Cancer and Gina Rester-Zodrow. The authors recount how their students observed the moon for 28 days and recorded their impressions.
How Come? by Kathy Wollard. Detailed answers to frequently asked questions about our world.