Microteaching is a teaching technique originated at Stanford University in 1963 to improve teaching skills. It involves teaching short 5-10 minute lessons to small groups of 5-10 students. The lessons focus on specific teaching skills. Advantages include improving teaching skills through repeated practice and feedback. Steps include defining a skill, demonstrating a lesson, planning and teaching a micro lesson, discussion, replanning and reteaching. Phases include knowledge acquisition, skill acquisition, and transferring skills to actual teaching. The supervisor's role is to demonstrate skills, evaluate lessons, and provide feedback to help trainees improve.