What most people would consider a horrible teacher was probably in my top 5 best, as a 9th grade Global Studies teacher who did nothing but show movies and give fill-in-the-blanks notes. Most of her class passed the exam with flying colors, surprisingly. My worst in terms of teaching skill was my 10th grade Algebra2/Trig teacher. Not a damn person in the class understood or remembered anything she said, and many either just barely passed, or only passed due to extensive self-study time to make up for the teachers faults (I was in the former). My worst teacher for general disposition? 10th grade Chemistry teacher. Routinely insulted the intelligence of the entire class (would tell us "I know you're smarter than these bad grades" and then switch around to say "What kind of idiots are you to not get this?"... in the span of a sentence or two), put her personal views before those of the school (did you know it's against policy to obscure the American flag? and that she had an LGBT flag doing just that, 24/7?), and failed more students that I know of than she passed. I've talked with everyone I know who has ever had her, and used them to reach even more people who have had her, and over 6 grades worth of her classes, I've not found a single positive review.