>>lewisf+(OP)
I love how the answer given to this problem is more funding. Such an indication of what's wrong with modern education. This entire article is exposing the TI monopoly on calculators, getting 85-90% profit margins, and our solution is to strike to get taxpayer money to keep paying for the things? We should encourage competition.
Consider - an app that replicates this functionality on the phone, but tracks if the user at any point closes the app. This then is reported to the teacher so the teacher knows if there was any cheating.