Review the rock cycle with this second-, third-, and fourth-grade crossword puzzle!

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

Get to know the Apollo 11 space mission in this science and history worksheet!

What happens to water after it rains? Learn about the stages of the water cycle in this colorful worksheet!

Discover examples of weathering, erosion, and deposition with this fourth-grade worksheet!

Study the night sky with this hands-on science worksheet for third and fourth graders!

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