In this interactive lesson, students read about how units in the metric system are related to each other and practice locating measurements on a metric line.

In this animated and interactive object, learners examine the definitions and formulas for radius, diameter, circumference, and area. Students also solve practice problems involving the circumference and area of a circle.

In this animated and interactive object, learners view two examples of how to subtract fractions with unlike denominators and then work five similar problems.

Students read how to organize their work when multiplying more than two signed numbers. A review and practice problems complete the activity.