# 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.

#### Objectives

Students will be able to

• write an algebraic expression using one or more operations, including
• 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.

#### Prerequisites

Students should already be familiar with

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

#### Exclusions

Students will not cover

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