In this animated and interactive object, learners calculate the area and centroid of a triangle.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to use the fundamental laws of division to simplify algebraic expressions.

In this interactive object, learners examine the properties of equality and use those properties to solve simple equations.

In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."