What is solar energy? Discover how we use the power of the sun, and complete this worksheet about an important renewable energy source.

Looking for a quick reference about gravity and a definition for kids? This two page worksheet and activity has you covered!

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

Let your kid's knowledge of leaf vocabulary climb as high as a tall, tall tree with this fun word search.

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