What is the term for a lesson where proper skills are exhibited by the teacher or students?

The correct term for a lesson where proper skills are exhibited by the teacher or students is "Demonstration lesson." In a demonstration lesson, the instructor showcases specific techniques or skills, allowing students to observe and learn through direct visual examples. This approach is particularly effective for teaching practical skills in areas such as cosmetology, where seeing the application of techniques is essential for comprehension and retention.

In contrast, a theory lesson primarily focuses on the concepts, principles, and knowledge behind a subject, often through lectures or discussions, without the direct application of skills. A practical lesson combines theory with hands-on experience, but it typically involves the students actively practicing skills rather than solely observing them being demonstrated. A review lesson, on the other hand, is meant to reinforce previously taught material and may not include the active demonstration of new skills. Thus, a demonstration lesson is specifically designed for showcasing and exemplifying skills, making it the most fitting term in this context.