Q&A #315

Teachers' Lounge Discussion: Value of two-column proofs

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From: meg maenpaa <megaclarinets@hotmail.com>
To: Teacher2Teacher Public Discussion
Date: 2002040709:47:07
Subject: two-column proofs, why and what is a flow proof

I am a pre-service teacher,non-traditional(did high school proofs 25
years ago). I found my way to this discussion looking for a good
reason(s) for doing proofs to give to students as part of an essay
question. I wholeheartedly agree that doing proofs is a good way to
teach logical reason and argument. However I was working pretty hard
trying to think of a good reason to give a student which might appeal.
I am sure my 14 year-old is going to have something to say, and
probably not good, about having to do proofs next year. What do you,
who are experienced teachers reply to the frustrated student who says,
"Why do we have to do all these proofs?"

I've done paragraph proofs, flow proofs, and proofs by contradiction. 
Can someone direct me to a textbook that explains flow proof. 

meg maenpaa

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