## Reflection: Diverse Entry Points Football Helmets - Day 2 of 2 - Section 2: Completing The Activity

The lesson progression from Breaking Even to Football Helmets was designed to help students see with number sense why the two expressions should be set equal in order to find the missing value and then why we solve equations with variables in both expressions by subtracting/adding one variable term to the other.  Algebraically solving the equation using logic to isolate the variable is actually the same as applying number sense to solve for the unknown value.  As students worked through these questions in small groups, I purposefully chose these two students to present the same answer but using two different methods so students begin to see the algebraic connection to higher level equations that I want them to see as we move into solving equations with variables in both expressions.

Diverse Entry Points: Student Presentations - Mini Wrap-up

# Football Helmets - Day 2 of 2

Unit 3: Solving Linear Equations in One Variable
Lesson 16 of 29

## Big Idea: Source out football helmets to find who is the better deal.

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Subject(s):
Math, Algebra, solving equations, 8th grade math, real world, master teacher
52 minutes

### Christa Lemily

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