## Reflection: Exit Tickets Introduction to Solving Equations - Section 5: Closure and Ticket to Go

After looking through students’ exit tickets, I noticed that there were some common mistakes in solving and writing equations.  Here some mistakes that students made on problem 2.  The balance showed 21 coins on one side and 3 bags on the other side.

• Some students said there were 7 coins in each bag, but then created the equation 21 = 7b.  These students have the right idea, but did not create an equation that modeled the three bags on the right side.

• Other students created an expression 3b, but did not make it an equation.  These students understand what is happening on the balance, but need a refresher on the difference between an expression and equation.

• Some students created the equation 21 = 7 x 3 without using a variable.  Although this true, I want students to get accustomed to using variables in the equations.

• Other students used the x to represent multiplication.  I want students to understand that the x is not the best way to represent multiplication with algebra, since it can be confused with a variable.

• Some students created the expression 21= b+b+b.  This is correct, but I want students to recognize that a more efficient and common way to represent this is 3b.

I will pass back these tickets to go in the next lesson so students can see and correct mistakes.  I will also talk about the ideas behind these mistakes throughout the unit.

Exit Tickets: Ticket to Go Common Mistakes

# Introduction to Solving Equations

Unit 6: Expressions, Equations, & Inequalities
Lesson 5 of 20

## Big Idea: What is going on in the equation 3x + 2 = 17? What does x equal? Students work with the concept of equality and balance to solve one and two-step algebraic equations.

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26 teachers like this lesson
Standards:
6.EE.A.4 6.EE.B
Subject(s):
Math, Algebra, Expressions (Algebra), 6th grade, master teacher project
50 minutes

### Andrea Palmer

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