《义务教育课程标准(2011年版)初中化学》中指出:要优化课堂教学过程,提高课堂教学的有效性,努力创设真实有意义的学习情境,真实、生动、直观而又富有启迪性的学习情景,能够激发学生的学习兴趣,帮助学生更好地理解和应用化学知识。教师应根据教学目标、教学内容、学生的已有经验,以及学校的实际条件,有针对性地选择学习情境素材,引导学生从真实的学习情境中发现问题,提出解决问 “Compulsory education curriculum standards (2011 edition) junior high school chemistry” that: To optimize the classroom teaching process, improve the effectiveness of classroom teaching, and strive to create a real and meaningful learning situations, real, vivid, intuitive and enlightening learning scenarios , Can stimulate students’ interest in learning, help students to understand and apply chemical knowledge better. Teachers should be based on teaching objectives, teaching content, the students’ existing experience, as well as the actual conditions of the school, targeted selection of situational material, and guide students to find out from the real learning situation, put forward to solve the problem