In China, students learn a lot of necessary lessons before they finish high school. They can choose the special class as they go to college. But in the western countries, the students need to take part in many special lessons to get enough credits, since they are in middle school. Though some action has been taken to improve students' level, still many schools ignore it and they focus to let students get high marks in the exams. The teenagers need to learn some practical skills, such as swimming, which can save their lives when they are stuck in the deep water. Students are always passionate about the special lesson.