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.

  Giving Students Access to Proofs
  Diverse Entry Points: Giving Students Access to Proofs
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Proving that a Quadrilateral is a Parallelogram

Unit 5: Quadrilaterals
Lesson 5 of 8

Objective: SWBAT prove the converses of the parallelogram property theorems.

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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Math, Geometry, Polygons, properties of quadrilaterals
  70 minutes
quad implies what
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