Salam All I will start with the worst teachers you ever had.... In another topic, we'll discuss your best professors.... I'll start with mine.... My worst one is my Math Teacher in High School...She was teaching us Calculus 1 and that's one class in which I did not understand a thing!!!! It was waste of time...The teacher didn't teach us anything at all....I got a 4/100 on my midterm because I slept through it......it was a really really bad experience....Some of you now might say why didn't you study by yourself or seeked a tutor...my answer for that would be: I didn't really care about the class since I was going to retake it in College anyway...... but yeah she was aweful...how about yours??.