Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Learn all about precipitation and the role it plays on the planet in this weather science worksheet.

Children hone their observation skills by matching the tracks to their corresponding water animal in this worksheet.

Celebrate dolphins, one of the most intelligent animals in the world, with a fun dot to dot coloring page.

Ancient mariners mistook the manatee for a mermaid! Your young biologist won't make the same mistake after learning about the manatee with this worksheet.

Did you know that insects like dragonflies have life cycles that are very similar to our own? Help your little scientist get to know the circle of life.

Use this fill-in-the-blank chart to see how much your kindergartener knows about the parts of a bee.

These pictures have a lot to say! The animals in this worksheet don't talkÃbut they can tell you a lot about what they're like by the way they look.

What is wind energy? Teach your students how we can use the wind to create electricity!

Explore the circle of life with this informative coloring sheet! Help your student color and learn the names of each stage of a ladybugâs life.

The mockingbird is internationally known, but it's also the most treasured bird in the state of Florida. Color in Florida's state bird in this coloring page.

Spark your child's interest in dinosaurs with this prehistoric dot to dot featuring plant-eating Stegosaurus.

Jump-start your kid's excitement about kangaroos! Together, you can learn some cool kangaroo facts, like how kangaroos can jump up to 30 feet.

Searching for a worksheet that will give your kid help with his science skills? This printable will challenge his knowledge of the metric system.

Before trees grow into trees, they start out as little seeds. Can your child match the fruit and seeds with the trees (or plants) they came from?

Milky Way: candy bar or galaxy of 100 to 400 billion stars?

Blue whale facts include that calves weigh up to three tons at birth and adults can be as heavy as 200 tons. Get other cool blue whale facts on this worksheet.

Did you know that the screw is actually one of the six simple machines? This handy machine helps to make work easier!

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!

Little space explorers, meet Mercury, the closest planet to the sun! This planetary coloring page comes with some fun facts about Mercury.

Budding inventors can get a fun review of the simple machines with this word search.

Does your learner ever wonder what makes the Earth dark at night and bright during the day?

The animal names on this third grade science and spelling worksheet are all mixed up! Kids unscramble reptile and bird names to complete the worksheet.

Understand nature's visual cues for the shifting of the seasons with this tree seasons match-up activity!

Hug a tree! It can be a home to many different animals. Can you identify the different shelters used by animals in this picture?

This worksheet combines the five senses with the fun and interesting topic of weather predictions!

Tree climbers and tree huggers alike, learn the basics of reading tree rings to find out about the life of a tree.

Explore the circle of life with this informative coloring sheet! Help your student color and learn the names of each stage of a dragonflyâs life.

Test your kindergartener's understanding of the parts of a dolphin with this adorable, fill-in-the-blank dolphin chart.

Just like all plants and animals, you go through different stages in life too! Help your child to see how he will change and grow throughout his life.