7th Grade Evaluating Algebraic Expression By Substitution Lesson Plan Example

Topic: Evaluating algebraic expression by substitution

Objectives & Outcomes

• By the end of this lesson, students will be able to evaluate algebraic expressions using substitution.

Materials

• Algebraic expressions
• Solutions to algebraic expressions (e.g. numbers, variables)
• Pen and paper for each student

Warm-up

• Ask students to give examples of algebraic expressions.
• Write their answers on the board.
• Ask students to explain what each sign in an algebraic expression represents.
• Encourage students to use concrete examples to explain their answers.

Direct Instruction

• Introduce the concept of substitution and explain how it can be used to solve algebraic expressions.
• Use examples to demonstrate how to solve an algebraic expression by substitution, starting with the given expression and replacing variables with corresponding values.
• Explain how to check the solution by using the original expression.

Guided Practice

• Give students a few examples of algebraic expressions to solve by substitution, with corresponding values.
• Have students work in pairs to solve the expressions, with guidance from the teacher as needed.

Independent Practice

• Provide additional examples of algebraic expressions to solve by substitution, with no guidance from the teacher.
• Have students work individually or in pairs to solve the expressions, with no assistance from the teacher.

Closure

• Review the steps for solving algebraic expressions by substitution.
• Have students share their solutions to the additional examples given in the lesson.

Assessment

• Observe students during the independent practice to assess their understanding of the material.
• Collect and review their substitution solutions for proper use of variables and algebraic operations.