An easy to do activity that investigates the basic theories of inertia. The activity is in lesson plan format that meets NSES standards.

An easy to do activity that investigates Bernoulli's principle. The activity is presented in lesson plan format that meets NSES standards.

[Free Registration/Login Required] A collection of ready-to-go worksheets and diagrams of simple machines.

AP Human Geography learning module on migration explores push/pull factors and migration patterns worldwide and within the United States. Comprehensive materials, multi-media and interactive resources.

[Free Registration/Login may be required to access all resource tools.] Featurea the definition of combining forces: Pulling down and pushing up, forces acting in opposite directions, forces acting in the same direction.