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

Looking for a fourth grade worksheet to help your kid with science? This printable will help with your child's botany vocabulary.

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!

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

Try out this simple worksheet diagramming the anatomy of a shrimp. Big words, small sea creature.

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

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

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

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.

Coyotes' famous howl gave them the nickname "song dogs." This is just one of several coyote facts your child can learn from this worksheet.

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

Learn all about the liver with this anatomy sheet. Our liver is one of many organs in the digestive system expelling waste from the body.

Hop right into this simple worksheet to memorize grasshopper anatomy. Match the provided words to the body parts of this hip-hoppin' creature.

All the animals in this word search share one characteristic: none of them have bones! Can your child find the boneless critters hidden in the puzzle?

Get to know one of the most unique and colorful monkeys, the red-shanked douc langur. Read about why they are an endangered species with this info-sheet.

Did you know that your tongue is one of the strongest muscles in your body? Tickle your learning taste buds with this worksheet all about your tongue.

Did you know that one of the main ingredients of a perfect pearl is dust? Learn all about the bizarre process behind every pearl with this science worksheet.

Lots of people like turtles, but how much do you really know about them? Get to know one of many types of turtles with this informational worksheet.

Budding paleontologists will refer to a word bank to identify 10 dinosaur-related vocabulary words in this playful word search puzzle.

These are the largest tortoises in the world, yet they are only two inches long when they hatch! That's one of the facts you can learn from this worksheet.

Learn about spider tortoises, one of the world's tiniest tortoise species, with this handy worksheet. Can't go to the zoo? We bring the zoo to you!

Did you know an elephant can eat 300 pounds of food in one day? This fun worksheet is jam-packed with fun facts, a word search and trivia, all about elephants!

There aren't many blue animals out there, but here's one that will be fun to color: the blue dart frog. Its bright color warns predators that it is poisonous.

Take a peek inside the human eye with this eye-catching worksheet! See a simple eye diagram and learn vocabulary words that will help your kid understand sight.