[Arefin Bari]

Option #1) If several members on your team feels the same way, get them all together and confront the teacher. Please don't be rude to your teacher, just explain how you guys feel about this whole situation. If the problem isn't taken care of this way, take this situation to the department head and so on. Ofcourse your teacher controls your grade but not to the point when you have to keep your mouth shut when you feel that something isn't fair.

Option #2) Just let things be and try to convince him (by action) that everything he is saying is not right.

good luck.