For school we had to get a Casio fx-cg20 calculator (see the picture below, it is a graphing calculator). I Finally found out how to put games on it. I cant find too much good sites to get games from though.. does anyone know good sites to get games from? They have to be G3A files. And before everyone starts that you shouldn't play games in class, i don't. I use it during breaks, since i am very good at forgetting (to charge) my phone.