This document discusses four teaching style categories: formal authority, demonstrator/personal model, facilitator, and delegator. For each style, it provides a brief description of the teacher's role and focus. The formal authority style is teacher-centered and focuses on content delivery. The demonstrator/personal model style involves demonstrating skills and acting as a coach. The facilitator style emphasizes student-centered active learning and collaboration. Finally, the delegator style gives students significant control over their learning through independent and group projects.