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

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

Don't let your kid bark up the wrong tree! Engage him in a word search filled with tree terms, boosting his attention to detail and problem solving skills.

Blast off into space with a fun planet printable. This one features Jupiter, the largest planet in our solar system.

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

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

There are lots of stories around the world for the rabbit moon: a rabbit image seen in the shadows on the moon's face. Here's one for young moon-gazers!

Get to know each of the Seven Summits, then organize their heights into a graph.

Young astronomers unscramble words to reveal the heavens in this fun space science worksheet.

Space enthusiasts will love learning about Freedom 7, the first manned American space mission.

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

Never heard of the planet Pirjute? That's because it's Jupiter, with mixed-up letters! Kids unscramble planet names on this third grade science worksheet.

Learners will discover what heat waves are, and how they are connected to global warming, in this two-page earth sciences worksheet.

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

Not your typical crossword, this puzzle will have your child learning to recognize the shapes of the continents. Great for map skills and vocabulary!