Are chickens mammals, fish, or birds? Sort animals by their traits in this informative life science worksheet!

Are cats trying to talk to us when they purr? Discover the meaning behind the purr in this worksheet that explores the three main types of cat purrs.

Unearth fossils in this explorative third-grade worksheet!

In this worksheet, children practice identifying animals of North America by their tracks.

The next time you're on a hike, be sure to take this leaf chart to guide you in identifying different types of leaves!

This short nonfiction text will provide students with an opportunity to become more comfortable with identifying and defining academic vocabulary words—and they'll have fun learning all about the life cycle of a chicken in the process!

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Ponder the pedigree of plants with this worksheet about inherited traits for upper elementary students!

Studying the human body? Get to know your body inside and out with this muscle diagram.

Learn about the Uinta ground squirrels of Yellowstone National Park.

Learners will get to know the bald eagle, the national bird of the United States and an inhabitant of Yellowstone National Park.

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

Explore grasslands and their fauna in this thought-provoking worksheet!

Learners will discover a simple overview of the human muscle system in this introductory worksheet.

Explore the lush plant life of the tropical rainforest in this second- and third-grade worksheet!

Analyze fossils with this engaging third-grade science worksheet!

Dip your toes into a marsh habitat in this second- and third-grade worksheet!

Deserts might seem inhospitable to life, but there are actually plenty of animals that can live there!

Explore a tropical rainforest habitat and its inhabitants with this engaging worksheet for third graders!

Find out how animals and plants change based on their environment in this worksheet!

Have fun learning about food chains in this charming science worksheet!

Explore a wetland habitat with this engaging short-answer worksheet for second and third graders!