Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Looking for a quick reference about gravity and a definition for kids? This two page worksheet and activity has you covered!

Learners will discover what heat waves are, and how they are connected to global warming, in this two-page earth sciences worksheet.

Let your kid's knowledge of leaf vocabulary climb as high as a tall, tall tree with this fun word search.

Learn a bit about meteors, asteroids and comets as they travel across the night sky. Can your child round out the page by adding color to these orbiting rocks?

Learn about some of the major U.S. watersheds in this fascinating science and geography worksheet!

Discover how cover crops enrich soil and support healthy crop growth with this research-based worksheet for fourth and fifth graders!

Discover Earth’s different spheres with this fourth- and fifth-grade earth science activity!