In college, I did my homework as soon as I got home from school. I was good at verbals, but not written tests. I tutored other students who got better grades. I was paid a stipend by the school to tutor students in Business courses.
During my working career, I have taught management courses in personnel management and bookkeeping, and did consulting to small businesses. Consulting was where real money was made. It was a time when businesses were converting from manual to computerized bookkeeping systems.