Another advantage is that Mr. Leachim is flexible. If the children do not understand something, they can repeat Mr. Leachim’s lesson over again. When the children do a good job, he tells them something interesting about their hobbies. At the end of the lesson, the children switch off Mr. Leachim. The good thing about Mr. Leachim is that he doesn’t have a never us system like a human, so he doesn’t get upset if a child is “difficult.”