Objective

By the end of this lesson, you will be able to solve algebraic expressions using Max and Ruby as a fun theme.

Materials and Prep

• Paper and pencil

Before starting the lesson, make sure you have a basic understanding of algebraic expressions and how to simplify them.

Activities

1. Activity 1: Max and Ruby's Equation Race

Create a race between Max and Ruby to solve algebraic expressions. Write down a few expressions on separate pieces of paper and place them in a hat. Each player takes turns picking an expression and simplifying it as quickly as possible. The first player to simplify the expression correctly wins a point. Repeat this activity with different expressions until you feel confident in simplifying algebraic expressions.

2. Activity 2: Max and Ruby's Missing Numbers

Create a set of equations with missing numbers for Max and Ruby to solve. For example, 3 + __ = 8 or __ - 5 = 10. Write down these equations on separate pieces of paper and have Max and Ruby fill in the missing numbers. Make sure to explain the steps they should take to find the missing number. Continue practicing until you feel comfortable solving equations with missing numbers.

Seventh Grade Talking Points

• "Algebraic expressions are mathematical sentences that include numbers, variables, and operations like addition, subtraction, multiplication, and division."
• "We use algebraic expressions to represent real-life situations and solve mathematical problems."
• "Simplifying algebraic expressions involves combining like terms and performing operations according to the order of operations."
• "In equations, we use variables to represent unknown values. We can solve equations by isolating the variable on one side of the equation."
• "When solving equations with missing numbers, we can use inverse operations to find the value of the missing number."