Re: "should certainly bolster sales in time for the new school term"
A maths teacher worth his salt can pose question in such a way that a regular scientific calculator is as useful as a paperweight of the same dimensions and weight during the exam. It can actually be fun to do this. In my exams I try to keep the answers fairly simple numerically, but tough in terms of algebra and insight required.
Calculators with symbolic equation solving pose more of a challenge to ensure you are testing for insight rather than skill at entering the equations and pressing "solve". The symbolic calculators are most certainly banned at maths exams at our uni.
Biting the hand that feeds IT
