I had one in highschool, and a 3a before that in high school - at the time no one else (at least in my school) used a laptop/equiv; I managed to be allowed as a dispensation due to dyslexia and illegible handwriting. The keyboard on the 5 was a vast improvement over the 3a, as well as the OS. I did quite a lot of programming directly on it - I remember OPL being one (only?) of the languages built in - https://en.wikipedia.org/wiki/Open_Programming_Language

My mother came to visit me recently, bringing my 5 back - unfortunately it looks like I left the batteries in all those years back and they leaked, so it's likely dead.