My daughter and I are finishing up chapter 2 in the geometry plans and I have some questions about how to grade proofs. My daughter is doing well on the straightforward stuff and can come up with the right reasons for the proofs where the basic framework is given. The trouble comes when given a proof solo. She generally has the gist of the proof, but often doesn't use the theorems proved in the chapter and tries to go about the proof differently than the key. This is the first chapter where the students attempt a proof. I was wondering how many points of of the test the proof should be worth (she just took the chapter 2 test) and what I should be looking for in order to give partial credit on the proof. Thanks!
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Geometry grading questions
Dorinda
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Re: Geometry grading questions
Originally posted by Mom2mthj View PostMy daughter and I are finishing up chapter 2 in the geometry plans and I have some questions about how to grade proofs. My daughter is doing well on the straightforward stuff and can come up with the right reasons for the proofs where the basic framework is given. The trouble comes when given a proof solo. She generally has the gist of the proof, but often doesn't use the theorems proved in the chapter and tries to go about the proof differently than the key. This is the first chapter where the students attempt a proof. I was wondering how many points of of the test the proof should be worth (she just took the chapter 2 test) and what I should be looking for in order to give partial credit on the proof. Thanks!
The goal is to demonstrate orderly, deductive reasoning (later also indirect proofs) to the desired conclusion, using previously given definitions, axioms (postulates) and previouslyproved theorems.
I hope this helps. Writing proofs is an art. Grading proofs is also an art and will require effort on your part to verify that the proof was reasoned correctly (or not).Cindy Davis
Science and Math teacher at Highlands Latin School  Indianapolis
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