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

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?

How well does your child know the layout of our Solar System? This worksheet focuses on the biggest planet, Jupiter.

This worksheet teaches all about the planet Saturn and its placement in the Solar System.

Teach your child about the layout of the Solar System with this simple worksheet, featuring the planet Neptune.

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