After years of similar work, mine culminated in a Link Cable Chat Program that I wrote on two calculators at the start of a big multi-hour test. We didn't use

After years of similar work, mine culminated in a Link Cable Chat Program that I wrote on two calculators at the start of a big multi-hour test. We didn't use it to cheat -- literally just to chat. Similarly, we'd been writing programs to solve our problems all year so we already knew all the formulas (because we'd been re-entering the programs as needed on fresh calculators). The teacher knew, which is why I think she allowed it.