A lesson is a period of time during which a teacher or instructor imparts knowledge or skills to a student or group of students. It can take place in a classroom, online, or in a practical setting such as a laboratory or workshop. A lesson typically involves a structured presentation of information, followed by activities or exercises designed to reinforce the learning objectives. The goal of a lesson is to help students acquire new knowledge, develop critical thinking skills, and apply what they have learned to real-world situations. Lessons can be delivered in a variety of formats, including lectures, discussions, demonstrations, and hands-on activities.