恰当的教学情境创设可以激发学生学习的兴趣,发挥学生的主体地位,引起学生的认知冲突,使学生产生问题意识,增强学习的针对性和有效性;有利于教师突破教学难点、突出教学重点,深化对问题的认识。但同时,在“情境”一统课堂的今天,有些教师对情境的创设或漫无目标、或流于表面、或纯属多余,使情境创设变味、走调,失去了情境应有的价值,产生种种不良倾 Appropriate teaching situation creation can stimulate student interest in learning, give full play to the dominant position of students, arouse students' cognitive conflict, make students produce problem awareness and enhance the pertinence and effectiveness of learning; help teachers to break through teaching difficulties and highlight the teaching focus , Deepen the understanding of the problem. However, at the same time, in the unified classroom of “Situation ”, some teachers create or aimlessly or unconsciously on the situation or purely superfluous, make the situation change taste, Produce a variety of undesirable dumping