UK too. I had to have a graphing programmable calculator for A levels in the 90s (16-18 year old). My college bulk bought them and sold them to us for a huge di

UK too. I had to have a graphing programmable calculator for A levels in the 90s (16-18 year old). My college bulk bought them and sold them to us for a huge discount. I can't remember if they were sharp or casio. At the start of exams you had to erase the memory and show the invigilator. Those things ate batteries! If you hit them on the back the outside cover of the screen would pop off. I found drawing a graph on the back of the screen in dry wipe marker, and then popping it back in, was a hilarious trick. People would rub like mad thinking someone had drawn it in the permanent marker (I would leave a permanent marker next to it to help them get the idea). I always messed around (or snoozed)in maths class, and still got an A. It was much later that I realised I actually had a learning difficulty...