Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

How do the Sun and the Moon interact with the Earth, and how do all three depend on one another? Find out in this science worksheet.

It's easy being green when you have our Earth Day game for a guide. Just print out this Earth Day game and get ready to score one for the planet.

This Earth Day quiz family and friends with this true or false questionnaire. It's all in good, informative, fun!

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

A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

These printable Valentine's Day cards are perfect for a kid who's in love with animals and science!

These Valentine's Day cards will be the oddest and most unique cards your sweetie ever got!

Find out how scientists explain our yawns and use the graph to keep track of your family's yawns for a whole day!

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

What's the difference between renewable and non-renewable energy? Help your student discover the various forms of energy we use each day.

Read about Alexander Graham Bell, the man who made it possible for us to stay connected all day long, in this biography that comes with a science experiment.

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!

Think toads and frogs are the same? Think again! Check out this breakdown of the differences between the two, complete with a quiz to check your new knowledge.

Learn all about light refraction by simply placing your pencil in a glass of water. Warning: your pencil may not be quiet the same afterward.

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

Explore magnetism with this colorful science worksheet for third and fourth graders!

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!

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

Discover how seeds move to new places with this cut-and-paste worksheet for second and third graders!

Match forms of energy to common examples in this third- and fourth-grade science worksheet!

Connect forms of energy to real-life scenarios in this third- and fourth-grade worksheet!

It's never too early to start teaching your kid about eating right and staying active.

Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

On this worksheet, kids learn all about the look and location of Uranus, and they get to cut out a picture to use in their own Solar System diagram.

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!