I'm in a small class of 24 students. Often the instructor will ask a question and no one will volunteer to answer it. I often know the answer and I'm not afraid to speak out, but I don't want to seem like the "know-it-all" in class. However, I do want to make a good impression. I usually wait to see if anyone else is going to answer or if the instructor is going to randomly call on someone before raising my hand. Should I continue to volunteer answers and comments or should I just keep my mouth shut like everyone else?