## Reflection: Developing a Conceptual Understanding Absolute Value Equations - Section 5: Homework

The final problem in this homework asked students to write a real-life absolute value problem that can be modeled with an equation.  This proved to be hard for my students.  The equations for absolute value are challenging as they aren’t always intuitive.  This provided a great opportunity for students to back up their work (Math Practice 3).  So many wrote problems without ensuring that they were feasible.  This was the discussion we had the next day in class.   I had them check that their equation provided the expected solutions.  For some like my sample Student Assignment, I had them look at their word problem as well to make sure that it was actually an absolute value problem.  As partners, they then redid their problems.  Ensuring the viability of a model is an important skill in a Common Core mathematics classroom.

Developing a Conceptual Understanding: Check Your Model

# Absolute Value Equations

Unit 2: Modeling with Functions
Lesson 18 of 24

## Big Idea: Modeling a range of solutions is the goal of this lesson on absolute values. How cold is it?

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Standards:
Subject(s):
Math, Algebra, absolute value, Algebra 1, Algebra 2, master teacher project, Absolute Value Equations, transformation of absolute value functions
50 minutes

### Amelia Jamison

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