You haven't' been paying attention in class. It seems your focus has been elsewhere like on Mizz Unique's legs and feet in her sheer nylon pantyhose. This teacher has her own methods to help you pay attention and while they might not be ethical they tend to work. Miss Unique has held you after class and has you all alone. Your instructor tells you to take out your cock as she removes your shoes, she's going to let you stroke and cum to her pantyhose encased soles and toes as you stroke watching her footjob the dildo in front of her. This teacher always has been good with props and once you cum for her, maybe you're attention will be on the lesson.