Professors are there to guide, to help, to goad, to irritate, to stimulate. Students are there to explore, to inquire, to ask questions, to experiment, to negotiate knowledge. The ideal teachers for our students therefore are people like Socrates, Jesus and Hillel, and what you have to ask of your professors is that they measure themselves by the model of Socrates, Jesus, and Hillel. Great teachers don't teach. They help students learn.
Students teach themselves.
Socrates was the greatest philosopher of all time, and all he did was walk around the streets and ask people irritating questions. And Hillel's greatest lesson, in answer to someone who told him to teach the entire Torah while standing on one foot - 'What is hateful to yourself, don't do to someone else. That's the whole Torah, all the rest is commentary. Now go study' - directed people to go off and learn on their own. The great teacher makes a few simple points.