Khan Academy
Khan Academy: Constraint Solutions of Two Variable Inequalities
Find the range of values of one variable that corresponds to a given value of the other variable in a linear inequality. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive...
Curated OER
Science Kids: Science Images: Inequation Sign
This picture is an inequation sign, used in mathematics to state that two expressions or objects are not the same, or do not have the same value.
Math Is Fun
Math Is Fun: Solving Inequalities
Learners investigate how to solve inequalities. The educational resource consists of notes about the concept, detailed examples, and practice problems.
Math Is Fun
Math Is Fun: Inequalities
Learners investigate inequalities. The educational resource consists of notes about the concept and detailed examples.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Reversing the Inequality Symbol
"Dr. Math" responds to a student inquiry of why it is necessary to reverse the inequality sign when multiplying/dividing by a negative value.
University of Regina (Canada)
University of Regina: Math Central: Reversing the Inequality Symbol
In response to a student question regarding the reversing of the inequality symbol, a method is presented in how one can avoid reversing the symbol.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving Polynomial Inequalities
"Dr. Math" responds to a student question on how to find the solution to a polynomial inequality. Dr. Math's solution is found through analyzing the graph of the function.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Absolute Value (Real Numbers Rational)
"Dr. Math" reponds to a problem submitted by a student. The problem involves absolute value inequality.
University of Saskatchewan (Canada)
University of Saskatchewan: Inequalities
This University of Saskatchewan looks at the basic rules of solving inequalities, concentrating on inequalities with absolute values. Includes example problems and exercises with their solutions.
Purple Math
Purplemath: Solving Linear Inequalities: Introduction and Formatting
This resource demonstrates how to solve linear inequalities step-by-step and shows four different solution formats/notations viz. inequality notation, set notation, interval notation, and the last "notation" which is more of an...
Illustrative Mathematics
Illustrative Mathematics: A Ced, a Rei Basketball
In this task, two brothers track how many games they have each won. Students are asked to make calculations based on the percentage of games won. They set up a rational equation (and a rational inequality) in one variable, and then solve...
Alabama Learning Exchange
Alex: Which Way Do I Go, George, Which Way Do I Go?
This lesson will explore the process of graphing inequalities on a number line. It will also explore writing an inequality when given a graph. This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.
Illustrative Mathematics
Illustrative Mathematics: A Rei Reasoning With Linear Inequalities
Young scholars are presented with a solution to an inequality and are asked to find two mathematical errors and explain why they are incorrect. Aligns with A-REI.B.3 and A-REI.A.1.
University of Regina (Canada)
University of Regina: Math Central: Graphing a System of Inequalities
A solution is presented to a student-submitted problem. The problem involves graphing and finding the solution set to a system of inequalities.
Wolfram Research
Wolfram Math World: Algebra
MathWorld provides a basic overview of Algebra. Includes a few formulas and many links to related topics.
Free Math Help
Free Math Help: Triangle Inequalities
The lesson investigates the Geometry topic of triangle inequalities. Students learn about the concept and view diagrams and exercises with solutions.
Other
Delta State University: Inequality Lesson Plan [Pdf]
This is a short lesson plan that would allow students to illustrate inequalities on a number line. There is a very short practice with this lesson.
Better Lesson
Better Lesson: Comparing and Ordering Integers
Students will compare and order integers on the number line. This activity includes a detailed plan with lots of examples, a screencast of the activity, and slides containing notes and problems.
Other
University of Wisconsin: Graphing Inequalities
This site, which is provided for by the University of Wisconsin, gives a discussion in how to graph an inequality is presented. A link to practice problems is provided.
Other
Algebra Practice Pages: Solving Inequalities
An interactive inequality solver allows you to practice solving problems that are randomly generated. You can practice on your own, then check your steps and the solution.
Soft Schools
Soft Schools: Less Than, Greater Than Worksheets
Generate worksheets where the student must write the correct inequality sign between two numbers (less than, greater than) that makes a true statement.
Wyzant
Wyzant: Fraction Mixed Number Calculator
Are you struggling with comparing fractions? Then try the fraction inequality calculator. Simply key in your two fractions, press the calculate button, and in seconds youll have an answer. The perfect tool for algebra students who need...
NumberNut
Number Nut: More or Less: Comparing Values Less Than Thirty Cents
Compare two groups of coins and determine which group is worth more or less than the other. Money values are less than thirty cents. Words, not inequality signs, are used to compare the values. Score is kept as you go through activity.
Oswego City School District
Regents Exam Prep Center: Algebra Ii: Absolute Value Inequalities
Resources to help you plan classroom instruction on absolute value inequalities: a lesson with several examples and step-by-step solutions; a six-question quiz with answers; and a teacher resource with guidelines for setting up and...