I specialise in tutoring English and history for school and adults too. I teach geography too. After finishing a lesson I usually let the students to teach me what they have learnt. If they cannot or have any confusion about the topic, it becomes very easier to find out eventually. Then I repeat the lesson until they have got clear concept about the topic.After a few days, both of us go through the topic again together. In this way, students usually do not easily forget their topic and they also can have a better understanding of the chapter.