On Jan 21, 2013, at 8:21 AM, GS Chandy <gs_chandy@yahoo.com> wrote:

Given that this problem takes very little time to
solve (especially in a group), and that the students
had considerable time to solve it, and didn't, all
the scratch work will show is that the students where
lost at step 1. Or, in your words, most students
"guessed" wrong, and a couple students weren't
exactly "guessing".

Bob Hansen

So in what way is your 'response' actually responding to any of the substantive issues about learning that had been raised?  A copy of the points raised is pasted below my signature for ready reference.

I was pointing out that you two are lost at step 1.:)

Bob Hansen