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

Learners review the basic math operations involving zero, emphasizing that division by zero is undefined. Examples are given.

In this screencast, learners follow a step-by-step process to solve trade discount problems.

In this interactive object, learners simplify ratios and solve problems using proportions. All terms are defined.

In this animated activity, learners read about the properties of a rectangle and its components. They then work practice problems to find the perimeter and area of rectangles.

Learners study the properties of a rectangular solid and use geometric formulas to find volume and surface area.

Learners review the fundamental laws of algebra including the commutative law of addition, the commutative law of multiplication, the associative law of addition, the associative law of multiplication, and the distributive law. Examples are given.

In this animated activity, learners read the definition of a parallelogram and then find the perimeter and area of parallelograms in practice problems.

In this screencast, you will learn about the 24 time zones.

Learners study the properties of a right circular cylinder and use geometric formulas to find volume and surface area.

Learners examine the properties of a triangle and work practice problems to find a triangle's perimeter and area.

Learners study the properties of a cube and use geometric formulas to find volume and surface area.

Learners study the properties of a regular square pyramid and use geometric formulas to find volume and surface area.

Learners study the properties of a right circular cone and use geometric formulas to find volume and surface area.

In this fourth part in a series, learners follow the steps of the “mathemagician” to examine three numerical curiosities: Be a Psychic by Predicting Birthdays, Predict a Card with Mind Reading, and Predict the Three Die Values Your Opponent Has Rolled. Learners will also study palindromic numbers and look at two alphametric puzzles.

In this interactive object, learners study the properties of a trapezoid and use a geometric formula to find its perimeter and area.

Learners tackle this interactive learning object after studying the mathematics of buying. This activity ties together the ideas of net cost, list price, trade discounts, cash discounts, net cost equivalent, and single discount equivalent, as well as the concepts of part, base, and rate.

In this animated activity, learners read about the properties of a square and its components. They then work practice problems to find the perimeter and area of squares.

Learners study the properties of a sphere and use geometric formulas to find volume and surface area.

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

The learner will recognize standard-position angles and find the reference angle for any standard-position angle.

In part 2 of this series, learners follow the steps of the “mathemagician” to examine these numerical curiosities: The 189 Challenge; An Armstrong Number: What’s Special About 153? Is 495 Different or Indifferent? Is 6174 Different or Indifferent? It is always 618, and Beginning and Ending the Same.

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

In this interactive object, part 3 in a series, learners follow the steps of the “mathemagician” to examine four numerical curiosities: What’s Special About 1089, Perfect Squares: 1089 and 9801, The Mathematical Significance of 1776, and The Calculator Number Game. The learner will also study six number patterns and look at one remarkable table. Immediate feedback is provided.