I was a fan of P and S values.
I took computer classes from home, but did math and such in class. We had to use a ti83 calculator and had to clear the memory before any tests. I had memorized formulas and cheat programs written and would spend 5 minute programming the calc so I could ace the tests. The only down side is our showing the work was more important than the correct answer.
On another note we had a writing class that deducted a letter grade for each day an assignment was late, plus the prof said she doesnt give As. I did everything a day late but got nothing but B's.