Tianjin junior high school curriculum is formulated according to the regulations of the national education department, aiming at ensuring students' learning effect and physical health. Self-study from 7: 30 to 7: 50 in the morning. Self-study in the morning is students' autonomous learning time before going to school in the morning, aiming at improving students' autonomous learning ability and learning effect. During this period, students can freely choose their learning content and study independently. Have the first class from eight to eight forty-five. The first class is the first formal course for students in the morning, usually Chinese, mathematics, English and other major subjects.