2. The principle of integrity: create all favorable conditions for all students, promote each student to improve and develop on the original basis, and meet the requirements stipulated in the syllabus.
3. Holistic principle: Combining the characteristics and contents of chemistry subject, through classroom teaching activities, promote the harmonious development of students' morality, intelligence, physique and aesthetics, and improve their comprehensive quality.
4. Subjectivity principle: completely abandon the "teacher-centered" and "injection" teaching ideas and methods, and replace them with "student-centered" heuristic and discussion teaching ideas and methods, that is, under the guidance of teachers, students take the initiative to learn, and the main role of students and the leading role of teachers are coordinated and harmonious.
5. Consistency principle: based on the syllabus, it is consistent with the teaching objectives set by the textbook.
6. Scientific principle: based on modern educational science theory, according to the tasks and requirements of middle school chemistry teaching, following the laws of chemistry teaching, determine the evaluation index and weight.
7. Objectivity principle: focus on the whole process of classroom teaching, and comprehensively evaluate classroom teaching from different angles and aspects. The evaluation process and conclusion objectively reflect the whole classroom teaching.