>After following the discussion about flow proofs this Winter, I was curious >to see which type of proof students would choose to use if left to their >own devices. I teach three sections of Integrated Math 2 using the new >textbooks published by McDougal Littell/Houghton Mifflin (it is a joint >effort). My students are 9th and 10th graders, many of whom do not have >English as a first language. The text presents three types of proof - >paragraph, flow and two column - at the same time. I tried to be neutral >in my own presentations and I always allowed the students to choose the >type of proof they wanted to use(unless they had to fill in the >justifications - at that point they had to follw the chosen format). > >At the end of the first unit which involved proof, I asked, as a test >question, "Which type of proof do you prefer? Why?" > >The result was almost unanimous in the students' choice of two column >proof. They found paragraph proofs too wordy - hard to write and follow. >Two column proofs, they claimed, were easiest to read and follow because >the steps were in logical order with the reasons lined up right next to the >steps. The only class in which any students choose flow proof was my >weakest (in terms of both mathematics and English language)class. > >Any comments? > >Jennifer > >Jennifer Kaplan
Did the same experiment. Two column proofs were prefered.