Dig into the past with this third-grade worksheet all about fossils!

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Cells are the building blocks of all living things! Help your little scientist learn the basics of a cell with this fun activity.

In this North American animal tracks worksheet, students hone their observation skills by matching tracks to animals.

Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

Learn the ins and outs of one of the body's most important organs: the heart!

Learn more about the bones in your body and just how important they are with this reading sheet and diagram, all in one.

Get to know some of the friendly, furry, feathery river wildlife that live near American rivers, then match each one to its home.

Unearth fossils in this explorative third-grade worksheet!

See which snail has gotten the farthest with this 2nd grade measurement snail race worksheet.

The narwhal is one unusual animal! Your child will learn about this horned sea creature through text and pictures.

Dip your toes into a marsh habitat in this second- and third-grade worksheet!

Whoa, this spider is quite the spinster! He is actually one of many brand new species discovered between 2009 and 2011.

Give your child a great coloring page full of fun flower facts! This one is about the iris flower and the butterfly.

Dive into habitat studies with this second- and third-grade worksheet!

Walter's Duiker is a new species of duiker, a kind of antelope, and one of many new species discovered between 2009 and 2011.

Decide which plants could live in a grassland with this second- and third-grade worksheet!

Determine which plants would survive in a pond with this second- and third-grade worksheet!

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

Did you know people can live with just one kidney? Get a head start on human anatomy with this info sheet on kidneys.

Learn how seeds move with this second- and third-grade matching activity!

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

Introduce your child to a fascinating new animal, the Baird's tapir. This is just one of many endangered species around the world.

Ever wonder how the human body functions? Enjoy this great info sheet all about the human heart, one of our most important organs.

Analyze fossils with this engaging third-grade science worksheet!

All living things go through many changes as they grow to be adults! Help your little one understand how he will grow and change.

Discover how plants survive in the desert with this third-grade habitat worksheet!

Color the T Rex Leech! Named for its sharp teeth, he is one of many brand new species discovered in the past two years.