In high school my friends and I decided that once we understood the concept of, say, the Pythagorean Theorem, making us solve it over and over again was busywork. So we made programs to solve things, and then an application called AMATH to collect all those programs.

At one point the teachers caught wind of this app everyone was using, and made everyone start showing their work. So I reprogrammed my modules to show their work, line by line. I soon forgot about all of this and went into an unrelated area of study at university; I think I only ever took one college-level comp sci class. Today I make my living in mobile apps.