Teach the chair
Teaching is the best way to learn. Why? Because what we call teaching is usually a combination of actions, attitudes, and responsibilities that make for good learning. The teacher is fully engaged and active, often acting with strong motivation, clear goals, and a sense of responsibility not just for the material and her/his own action, but also for others and for the group as a whole. "Student," on the other hand, often describes a very limited range of activity.