On Tue, 28 May 2013 07:30:03 -0700, DD_BobK wrote:

I certainly hope you're a paying customer.......

Yes. You can't audit without being registered, and,
you must take all exams and do all homework.

The only difference is the grade is Pass/Fail
(and the fact I'm three times the age of the students,
and, often twice the age of the professor!).

I have one advantage over some students, in that
I have an application in mind when the professor
discusses things - and I bring that to the table.

When I show the math, I show everything, down to
the last detail - for which I've received kudos
for in these classes.