Who is mr neck in the book speak by Anderson?

Mr. Neck is the coach who is apparently in charge of hall duty between classes and who also teaches in the Social Studies Department. He gives Melinda Sorvino an assignment to write a paper and present it in front of the class when she asks for a way to pull up her grade; she refuses to present after writing the paper and her classmate presents it for her in protest. Neck is a minor, static, flat character meant to reflect Melinda's resentment.