A "lesson" is a structured period of learning, typically guided by a teacher or instructor. It can take place in various settings, such as schools, online platforms, or informal environments. Lessons are designed to impart knowledge or skills on a specific subject, ranging from mathematics to art. They often include activities, discussions, and assessments to help reinforce the material. Lessons can be delivered in different formats, including lectures, hands-on activities, or group discussions. The effectiveness of a lesson often depends on the teaching methods used and the engagement of the students. Overall, lessons play a crucial role in education, helping individuals acquire new information and develop critical thinking skills.