i had one in CC, in 09, where advanced alg teacher decided everyone should be doing matrices, adv calculus, and discrete math, which was wierdly in the textbook for adv algebra for some reason. half the class dropped out by the last withdraw date, only because i informed/ and noticed how the professor unilaterally dropped people from the couse without telling them. oh and the prof also called the students “terrible” paraphrased because they dont know math and said he it is the reason why people are graduating HS with such a low level.