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

This fun worksheet is jam-packed with fun facts, a word search and trivia questions, all about the baboon!

Study the night sky with this hands-on science worksheet for third and fourth graders!

This worksheet features Uranus facts. Did you know this planet is blue and spins on its side?

Have you considered why elephants have trunks, or why polar bears have thick fur? Reflect on animal adaptations with this fourth-grade worksheet!

Have you ever wondered why giraffes have long necks or why lions have sharp teeth? Find the answers in this third- and fourth-grade worksheet about adaptations!

Learn facts about Venus, the planet that shines the brightest in our night sky! Then practice your knowledge of the solar system with bonus trivia at the end.

Learn facts about Mars, the great red planet in the night sky. There is more find out about space by answering the question at the bottom of the worksheet.

Learn a bit about meteors, asteroids and comets as they travel across the night sky. Can your child round out the page by adding color to these orbiting rocks?

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

Ever wonder why zebras have so many stripes? Find out with this fun worksheet all about the zebra!

There are many endangered species all around the world. Read about the Amur leopard and why it's endangered with this information page.

Learn some basic chemistry with this worksheet about the universal solvent: water. Find out why water is called the universal solvent.

Why did the fox cross the road? To look for the chicken! This fun worksheet is jam-packed with fun facts about foxes!

Animal lovers, get acquainted with a very unique species, the okapi! Read this info-sheet to learn about why this animal is endangered.

Help your child understand why it's so important to take care of the environment with this info-sheet about an endangered species: the spectacled bear.

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.

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.

This worksheet is a quick-reference tool of space vocabulary for kids, with an exercise to use the words properly in provided sentences.

Kids can explore ideas of storytelling and science as they fill in this comparison grid with their opinions. Start a conversation of ideas with this worksheet!

Get charged up about static electricity with this informative fourth- and fifth-grade worksheet!

Introduce your student to an endangered species, Przewalski's horse, with this information sheet. They can color the illustration as they read.

This worksheet teaches your child about physical properties of water, specific heat, kinetic energy and more.

Help your child understand the importance of preserving the environment, with this info-sheet about an endangered species: the Iranian jerboa.

Did you know that light could bounce? Set up a light obstacle course with a few mirrors and watch light bounce around your room.

With two simple yet fun experiments, this worksheet covers the interesting topic of cohesion and adhesion of water.

Get in tune with nature, and read a bit about an endangered species of animal, the Black-footed Ferret. Your child can color an illustration as he reads.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.

Make sure your young scientists stay safe as they conduct experiments!