She spent her evenings 'tutoring' her son in math. [=helping her son study math]
Some teachers stay after school to 'tutor' [='coach'] struggling students.
She earned extra money 'tutoring' in the evening.
(..) of two negative integers is a positive number. Yeah, like negative four and negative six. That's right. That's good. Well, you're a good tutor. Man, look, I... I can't do this. - It's not fair to Regina. - Why do you like her? Look, I know she can be really mean sometimes, but... (..)2004 Mean Girls
(..) I was gonna have to really commit. Not your best. Damn, Africa, what happened? - How'd you do? - Not so good. You know, I think I need a tutor. I'll tutor you, if you ever wanna get together after school or something. Do you think Regina would mind? No. You guys are friends. (..)2004 Mean Girls