This Earth Day, learn about conservation and the environment while you enjoy solving a fun puzzle! 

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

Flex your engineering design muscles with this engaging STEM worksheet for upper elementary students!

Track down the missing matter in this fifth-grade science worksheet!

The infamous Halley's Comet only comes around once every 75 years or so! Read some interesting info on the world's most famous comet.

A fill-in-the-blank exercise on tornadoes, made for fifth grade science students.

Study ecosystem changes with this drought-focused worksheet for fourth and fifth graders!

Learn how energy changes forms with this fourth- and fifth-grade physical science worksheet!

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

Fourth and fifth graders will cut out and assemble a human skeleton from paper in this engaging life sciences printable.

Discover Earth’s different spheres with this fourth- and fifth-grade earth science activity!

Discover Earth’s four major systems, or spheres, in this engaging fifth-grade worksheet!

Learn all about essential laboratory equipment with this hands-on worksheet for fourth and fifth graders!

Break down a word to create new ones with this fun worksheet for second through fifth graders!

Discover the connections between the sun, plants, and animals in this fifth-grade worksheet all about photosynthesis!

Take a peek into a temperate forest ecosystem with this food web worksheet for fourth and fifth graders!

Learn how conductors and insulators affect the flow of electricity in this helpful fourth- and fifth-grade worksheet!

Fifth-grade learners will look at a diagram of a cell, then follow the instructions to label its parts by color.

This kid-friendly, fill-in-the-blank diagram helps your fifth grader learn the technical terms for the bones in his torso.

Water covers 70% of Earth’s surface—but where exactly is it? Find out in this fifth-grade worksheet!

Discover how cover crops enrich soil and support healthy crop growth with this research-based worksheet for fourth and fifth graders!

Kids learn about the Earth's solid and atmospheric layers, then label the diagram with the correct terms in this fifth grade Earth science worksheet.

Teach your fifth grader about this important bony structure with a fill-in-the-blank skull diagram.

This worksheet gives your fifth grader some skeleton know-how, as she fills in the diagram with the bones from the wrist to the fingertips.

Do you know the functions of the primary organs in the human body? Put your knowledge to the test with this fourth- and fifth-grade crossword!

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!

Energy is a crucial part of physical science! All things on Earth have energy, whether it's potential or kinetic.

Discover how water flows in this informative environmental science worksheet!