27 Jan
2011
27 Jan
'11
3:24 a.m.
On Thu, Jan 27, 2011 at 1:32 AM, I wrote:
At a brief (and all too cursory) first impression, Don Cohen's approach seems to be based on what a student can discover with pencil and paper.
Sorry - I missed "The Use of Calculators and Computers in Don's Books and Tapes":