Contains easy instructions for making twenty models, manipulatives, and mini-books that will teach students in grades two through four about the human body.
An introduction to theories about the extinction of species, including the disappearance of dinosaurs. Provides a guide to museums all over the world with strong fossil collections.
An illustrated survey of the earth describing how it was formed, and including information on different types of rock, weather and erosion, the formation of mountains, and plate tectonics.
The Arctic tundra's dangerously cold nights can span eight or more months and some ground never thaws, but this area is home to a surprising diversity of wildlife.