Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Can you identify the difference between inherited and acquired traits?

Analyze everyday objects and identify states of matter with this second- and third-grade science worksheet!

Mix, boil, and toast your way to understanding energy transformations with this fourth-grade worksheet!