IV. Fill in each blank with a word in the box. A lesson in school is a planned period of time for (1) _______ . It involves one or more students being taught by a teacher. A lesson may be either one section of a textbook or a short period of time during which learners are taught about a (2) _______ or taught how to perform an activity. Lessons are generally taught in a (3) _______ but may instead take place in a situated learning environment. Also, a lesson means a learner learning something he did not (4) _______ before. Such a lesson can be either planned or accidental, (5) _______ or painful. The slang phrase to teach someone a lesson, means to punish or scold a person for a mistake they have made to make sure that he does not make the same mistake (6) _______ .