Or at least that's what I thought about I got to the part about the guilt the author felt over the purchase, and the teacher trying to buy them out of pocket. It really is despicable that we require 100$+ purchase every student's education when there are so many realistic cheaper alternatives
This could be solved with a simple sellback program.
1. Purchase from school for $100
2. Sell back for $95
3. Repeat forever until calculator breaks
When I got to college I retook the remedial math courses (starting with the equivelent of Algebra II) before I could take calculus (and the other math courses for a CS degree).
Not a single professor of a math course let us use a graphing calculator, and infact, most had a "no calculator" policy.
I never really put that together: you can learn the same curriculum with or without a calculator.