Crazy what they have these days. Back when I was in high school (first year they required the 83) our teachers simply required we showed every step. So we could get the answer with a few key presses, but unless we showed how to get the answer we wouldn't get credit. Of course I wrote programs to solve the problems step by step and print out the answer, but I guess the system works because in the process of being clever and writing the programs I of course learned how to solve the problems step by step.