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

Did you know that invertebrates don't have backbones? Find out some different types of invertebrates with the clues in this crossword puzzle.

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!

How much do you know about our home planet? Boost your Earth knowledge with this science printable.

Let your curious kid learn a little bit about how fireworks work in this summer science sheet.

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

What does the Earth look like? Find out all about the nooks and crannies that cover the planet with this landforms worksheet.

Find out more about what REALLY dwells in swamp ecosystems with this worksheet all about swamps.

Help your 2nd grader crack the code using triple digit addition and subtraction to find out what parts of camels can be used to make some tasty dishes.

Did you know that 763 Earths could fit inside Saturn? Learn more fun facts about Saturn on this fun science printable.

How do the Sun and the Moon interact with the Earth, and how do all three depend on one another? Find out in this science worksheet.

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

Can't go to the zoo? We bring the zoo to you! Check out the fulvous whistling duck, a bird with social skills and the willingness to share each other's nests.

Do you know why Mars is called the Red Planet? Find out that and more on this planet printable.

How much do you know about our solar system's planets? Kids learn facts about Neptune in an out-of-this-world worksheet.

Quiz your kid on the names of bones in his spine with this colorful worksheet.

How far away is the Red Planet from the sun? Find out with this great Solar System printable.

This fun cut and paste sheet teaches kids about the process an apple tree goes through as it grows.

Find out more about single-cell organisms with this coloring page and diagram.

This bright and colorful worksheet helps your child bring the technical terms of the bones in his legs down to size.

Teach your fifth grader about this important bony structure with a fill-in-the-blank skull diagram.

In which habitat could you find a blue whale, a squid, and a shark? The ocean, obviously! Have your kid find ocean animals with this word search worksheet.

Don't let school year learning slip away this summer: use this chemistry worksheet to practice identifying elements.

Look for natural resources around a farm in this engaging worksheet for second and third graders!

Explore the vast ocean with this habitat worksheet for second and third graders!

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

Dive into a coral reef habitat with this second- and third-grade worksheet!

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

This worksheet tests kids' understanding of basic heredity by asking them to match parent turtles with their offspring based on similar traits.

This worksheet gives your fifth grader some skeleton know-how, as she fills in the diagram with the bones from the wrist to the fingertips.