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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.

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

There are some parts of our brains that are still too complicated for scientists to understand! Find out the basics of the brain's functions with this fun page.

Young botanists test their plant know-how with this quiz.

Does your budding biologist know his plant parts? Get a great review of some important plant vocabulary with this info page.

Do you know which animal has two humps? Your child will use clues to determine what animal name fits in the crossword puzzle with this worksheet.

Do you know the functions of the primary organs in the human body? Put your knowledge to the test with this fourth- and fifth-grade crossword!

Did you know chinchillas were almost extinct? This fun worksheet is jam-packed with fun facts about the fuzzy chinchilla!

How much do you know about man's best friend? This fun worksheet is jam-packed with fun facts about dogs!

How much do you know about the U.S. national bird? Learn all about the bald eagle with this fun, informative worksheet!

Did you know that cheetahs are the fastest land mammal? This fun worksheet is jam-packed with fun facts all about the cheetah.

Did you know wolves are the largest members of the dog family? This fun worksheet is jam-packed with fun facts about the wolf!

Did you know that some caribou travel 3,000 miles in a year? This fun worksheet is jam-packed with fun facts about the caribou!

Did you know chameleons can sleep upside-down? Learn more about chameleons with this fun worksheet, jam-packed with fun facts and activities!

Did you know opossums are marsupials, which means they have a pouch! This fun worksheet is jam-packed with fun facts about the opossum!

Roses are red, violets are blue, I know the parts of a flower, how about you? Learn about flower anatomy with this worksheet.

Did you know cougars can leap 20 feet from a sitting position? This fun worksheet is jam-packed with fun facts about the cougar!

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

Did you know plants make their own food? Discover how with this fill-in-the-blank worksheet for third and fourth graders!

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

Get to know the residents of the reef with this coral reef-themed crossword, perfect for expanding life science knowledge and working on vocabulary, too!

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 a baby kangaroo is called a joey? This fun worksheet is jam-packed with fun facts, a word search and trivia, all about the kangaroo!

Did you know that each tree tells a story? In this worksheet, children peer inside a tree to learn about the layers in its trunk.

Did you know you're 1,000 times more likely to drown than you are to be bitten by a shark? This fun worksheet is jam-packed with fun facts about the shark!

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!

Help your child read this page about the Sumatran rhinoceros, where they can color an illustration as they learn about why this animal is endangered.