Planning a unit on simple machines? Save some time and energy with this collection of lessons and activities that explores how these devices are used in the real world to make life a little easier. 

In this eighth-grade science standardized test practice activity, pupils answer 78 multiple-choice and short-answer questions to review their knowledge.

In this science test worksheet, fourth graders complete 41 multiple-choice questions covering a variety of fourth-grade science concepts.

Twelfth graders cite real life applications of Kirchhoff's rules. In this physics activity, 12th graders calculate current, power and voltage using Kirchhoff and Ohm's laws. They explain the different components and uses of...