When I was younger (12, to be exact), I had to take some exams to enter into my high school. So for that, they had me prepare and take tutoring lessons for Math and Language, respectively. I think these lessons were slightly expensive, but apparently the tutors were somewhat renowened, and my friend also went with me. I think I went for a couple of lessons, but ultimately got kicked out because I couldn't "get it" or something, and apparently the teachers told my mother I wouldn't pass the exams at this rate.
So after that, my mother found another teacher for me, and she was just a humble woman that didn't have any formal place or anything. She was just a normal mother that ocassionally tutored kids. She was very nice, and I only went to very few classes and understood everything a lot faster than the other tutors.
Fastforward to the entry exams, and I got 7th place for my results out of many other students. It was kind of surprising for me, because I was never particularly great at school stuff (or so I told myself).