## Reflection: Developing a Conceptual Understanding Polynomial Puzzles 1: Adding and Subtracting Polynomials - Section 2: Investigation: Puzzle

I was extremely impressed by how well students did with this activity.  I actually anticipated that students would use much more subtraction to fill in the missing boxes.  Instead, I heard students reasoning more algebraically.  They would say things like "If I have a 2x^2 as the answer and I am starting with a 4x^2, then I must need a -2x^2."  This type of thinking was pushing students far beyond a typical combining like terms problem.  In order to fill in the missing boxes, students had to have a much more conceptual understanding of the way to combine the terms in a polynomial expression.

Polynomial Puzzle Reflection
Developing a Conceptual Understanding: Polynomial Puzzle Reflection

# Polynomial Puzzles 1: Adding and Subtracting Polynomials

Unit 4: Polynomial Expressions
Lesson 4 of 18

## Big Idea: This lesson uses an interesting mathematical organizer to help students fluently add and subtract polynomial expressions.

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40 minutes

### James Bialasik

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