Khan Academy
Khan Academy: Two Variable Inequalities From Their Graphs
Fit an algebraic two-variable inequality to its appropriate graph. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Paul Dawkins
Paul's Online Notes: Calculus I: Proof of Various Limit Properties
The tutorial proves some of the basic properties and facts about limits. Topics discussed are limit properties, triangle inequality, continuity, and limits at infinity. Class notes, definitions, and examples with detailed solutions are...
Khan Academy
Khan Academy: Compare and Order Absolute Values
Write an inequality to compare absolute values. Order numbers written in absolute value form from least to greatest. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Equations and Inequalities Word Problems
Construct an equation or an inequality that models a given context. Modeling expressions can be quadratic, rational, or exponential. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video,...
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.
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.
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...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: High School Basic Algebra Review
An overview of basic high school algebra topics can be found here. Absolute value, signed numbers, inequalities and equations, mixture problems, and direct and indirect variation are all listed, each with links to questions posed by...
University of Regina (Canada)
University of Regina: Math Central: Graphing Inequalities of Conic Sections
A solution to a student submitted problem is given. The problem involves systems of conic sections with inequalities.
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.
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.
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...