Use clues to fill in the boxes in this crossword puzzle, and learn more about freshwater fish along the way.

Kids learn important plant and animal cell vocabulary as they plug the words into their correct spots and complete the puzzle.

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!

What has two legs and carries its baby in a pouch? Fill in this crossword puzzle and learn some fun facts about two-legged creatures!

From glaciers to mountains to wetlands, our planet has lots of different landforms. Help your child learn all about them with this fun earth science crossword.

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!

All kids love animals, but how much does your child know about them? Kids will get to learn some animal vocabulary with this wild crossword puzzle.

If you know what each planet looks like, you'll have no trouble with this intergalactic crossword puzzle.

Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

What's the animal that swims upstream? Help your child figure this out with this cold-blooded animal crossword puzzle worksheet.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

Review energy terminology with this fun fourth-grade crossword puzzle!

Here's a fun way to review photosynthesis with your child! She'll show off her science knowledge as she answers questions to complete the crossword puzzle.

Review the terminology of collisions with this engaging crossword puzzle for fourth graders!

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