Microteaching is a technique used to train teachers that involves teaching a small concept to a small group of students over a short period of time. It allows the teacher to receive immediate feedback and make improvements by re-planning and re-teaching the lesson. Some key aspects of microteaching include practicing specific skills like questioning, explaining concepts, and using the blackboard effectively. The process follows a cycle of planning, teaching, receiving feedback, and re-teaching to incorporate the feedback for improvement. Compared to traditional teaching, microteaching uses a smaller class size and duration to focus on developing individual teaching skills.