Activity
Purple Math

Purplemath: Absolute Value Inequalities

For Students 9th - 10th
Purplemath.com offers a discussion is presented on how to solve absolute value inequalities. This lesson contains worked problems of solving absolute value inequalities and finding absolute value expressions given the solution.
Interactive
Cool Math

Coolmath: Solving Absolute Value Inequalties With Less Than

For Students 10th - 12th
Descrption and examples of solving absolute value inequalities.
Interactive
Cool Math

Coolmath: Solving Absolute Value Inequalties With Greater Than

For Students 10th - 12th
Descrption and examples of solving absolute value inequalities.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Absolute Value Inequalities

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students solve problems involving absolute values and inequalities. Students can watch a video tutorial, explore guided notes and attempt practice...
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Triangle Inequality

For Students 9th - 10th
Dr. Math gives a hint of how to prove the triangle inequality theorem when answering a question posed about proving an absolute value problem using the triangle inequality theorem.
Activity
University of Regina (Canada)

University of Regina: Math Central: Solving Absolute Value Inequality

For Students 9th - 10th
In response to a student submitted problem that involves an absolute value inequality, a solution to the problem with an explanation of steps is given for you to follow. Site by University of Regina.
Unknown Type
Interactive Mathematics

Interactive Mathematics: Solving Inequalities W/ Absolute Value

For Students 9th - 10th
These examples can help you solve absolute value inequalities. They show each step and are easy to follow. The last example demonstrates how to graph the solution.