Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

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

If you push your little brother, does he push back? Well, according to Newton's third law of motion, he does!

I spy with my little eye... six simple machines! Here's a fun way to help your child review the simple machines.

Explore the strength of magnetic forces with this worksheet for third and fourth graders!

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

Use your powers of prediction to project the future movement of playground objects!