Amy Hansen

Updated for 2020, Intermediate readers explore concepts of evaporation, condensation, and water as a solid, liquid, or gas.

Updated for 2020, Early readers investigate what matter is.

Describes how insects survive in the cold winter with hibernation tactics, including living underground, migrating to warmer climates, and freezing until spring.

Emergent readers learn about the cycle of day and night.

In graphic novel format, text and illustrations explain how Earth's movement causes day, night, and changes in the seasons.