## Reflection: Diverse Entry Points Proving that a Quadrilateral is a Parallelogram - Section 1: Concept Development

In this lesson, I really tried to find a way to give students access to writing proofs. In "Ways to Prove a Quadrilateral is a Parallelogram" I basically laid out the plan for writing each proof that students would have to write in the lesson. The resource is structured to have students read to find out about the plan for each proof and to verify that they understand the plans by having them answer check for understanding questions and fill in the blanks that are missing in the plans.

I knew this approach was effective when I saw students referencing the plans when it was time for them to write proofs on their own. Some students did not need this, but for those who did, the plans gave them an entry point into writing the proofs and these students felt just as proud of themselves after completing the proofs as those who didn't use the plans as an aid.

Diverse Entry Points: Giving Students Access to Proofs

# Proving that a Quadrilateral is a Parallelogram

Lesson 5 of 8

## Big Idea: What do you call a quadrilateral with diagonals that bisect each other? In this lesson, you'll call it the given information in a proof.

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Standards:
Subject(s):
Math, Geometry, Polygons, properties of quadrilaterals
70 minutes

### Anthony Carruthers

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