Linear Inequalities Lesson Plan

Instructor: Joanne Abramson

Joanne has taught middle school and high school science for more than ten years and has a master's degree in education.

This lesson plan introduces students to the concept of solving inequalities with two short videos, group work and partner work. Students will practice writing and solving linear inequalities then test their knowledge with brief quizzes.

Lesson Objectives

By the end of this lesson, students will be able to:

  • Define the term 'linear inequality'
  • Solve 1-step linear inequalities
  • Solve 2-step linear inequalities

Length

1 - 1.5 hours

Curriculum Standards

  • CCSS.MATH.CONTENT.6.EE.A.2

Write, read, and evaluate expressions in which letters stand for numbers.

  • CCSS.MATH.CONTENT.6.EE.B.5

Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true.

  • CCSS.MATH.CONTENT.6.EE.B.6

Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.

Materials

  • Class set of mini white boards or laminated white paper
  • Class set of dry erase markers and erasers

Instructions

  • To begin the lesson, write a statement such as the following on the board: 'You have to be at least 16 years old to have a driver's license.' Ask students to provide possible ages for a person with a driver's license. Once students have provided you with a list, show them how to write the statement as an equations (x >= 16). Try this activity again with a similar statement, such as: 'Max can only lift 60 pounds.'
  • Explain to students that these statements are inequalities and that the class will be learning more about inequalities through two video lessons.
  • Distribute the mini white boards, markers and erasers to the students.

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