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Lesson Plan: Writing and Evaluating Algebraic Expressions

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to write algebraic expressions from a worded description or diagram and evaluate algebraic expressions for specific values of their variables.


Students will be able to

  • write an algebraic expression using one or more operations, including
    • addition,
    • subtraction,
    • multiplication,
    • squaring,
    • division,
  • write an algebraic expression to represent
    • a given word problem,
    • a real-world situation,
    • simple properties of a geometric figure, such as the area or the perimeter,
  • explain in words what an algebraic expression represents,
  • evaluate an algebraic expression by substituting the individual variables for numerical values.


Students should already be familiar with

  • addition, subtraction, multiplication, and division of positive and negative integers,
  • the language of algebra.


Students will not cover

  • simplifying algebraic expressions,
  • algebraic equations and formulas,
  • algebraic expressions of degree higher than 2,
  • rational numbers,
  • absolute values.

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