best teacher? i wont really consider it teaching but it had really helped me a lot in my 1st year of programming.

me: *sends an email* hey i dont really understand how to do this part
teacher: i dont really know how to explain it so i coded it myself *sends me code*
me: oh thanks! *copy paste to mine*

after a week:
I GOT A PERFECT SCORE!! but ofc now i dont trust the teacher's code anymore. i deal with my own code.