Date: Jan 21, 2013 2:37 PM
Author: Richard Strausz
Subject: Re: To K-12 teachers here: Another enjoyable post from Dan Meyer

> My guess is that if only 18 out of 20 children failed
> to work this problem to a successful conclusion, it
> was not due to not "seeing the trick". My guess it it
> had to do with (lack of) tidy record keeping and
> double checking.
> Cheers,
> Joe N

I can't speak for the students, but I was an incorrect solver too (2 errors), because of a lack of tidy record keeping and double checking...