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

Brush up on some physics vocabulary with this energy word search!

Explore the applications of electrical energy with this helpful second-grade worksheet!

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

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

Discover different types of energy with this third- and fourth-grade science worksheet!

Determine which magnets have the strongest force in this third- and fourth-grade worksheet!

Do you measure distance in inches or seconds? When do you use miles? Answer these and more with this third-grade worksheet about the customary system of measurement! 

Learn about some of the most common forms of energy with this helpful one-pager for third graders!

Use a seesaw to see what happens when opposing forces become balanced or unbalanced!

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

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.

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

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

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

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!

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

Get a lesson in sports and science with this engaging third- and fourth-grade worksheet!

Never heard of the planet Pirjute? That's because it's Jupiter, with mixed-up letters! Kids unscramble planet names on this third grade science worksheet.

Consider the factors that affect magnetic forces in this informative third- and fourth-grade worksheet!

Did you know that an elevator is actually one of the six simple machines? Help your child understand how the pulley works.