IF THEY CAN TEACH ... IN GOOD ENGLISH.
First year at A&M the prof of a math class (Indian ? can't remember) was a 'good teacher' ... for those that could understand him. I couldn't - and it pissed me off that I was paying for a class like that. Had to learn it on my own, the lectures were absolutely worthless to me. Probably served me better in the long run, though. Those basics, learned on my own, have stuck with me and served me well.
I ended up with a 4.0 in that class.
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...