According to the school that we have been teaching has the different numbers of student. Some school has many students and some school hasn’t. So our teaching techniques and materials to teach students are different. There are many teaching techniques in this world but we can’t use it all for students. We have to realize the student’s background knowledge and their previous abilities. If we don’t find what are the student’s strong points and weak points about English abilities, we will use wrong techniques and materials for them