随着新课改的不断深入,很多教师越来越重视合作学习在教学中的应用,但大多数教师在教学实践中仅仅关注合作学习的小组的组成结构、内容的选择、合作开展的组织形式,而对开展的时机却鲜有考量。本文提出在新旧知识难以形成链接时、在学生提出富有思考意义的问题时、在认知游离表面难以紧扣本质时、在认知混淆不清难以辨别时开展合作学习,从而将合作学习用在刀刃之上。 With the continuous deepening of the new curriculum reform, many teachers pay more and more attention to the application of cooperative learning in teaching. However, most teachers only pay attention to the composition and structure of the cooperative learning group, the choice of content and the organization form of cooperation in teaching practice , But little consideration has been given to the timing of the launch. This paper proposes that when the old and new knowledge are difficult to form a link, when the students put forward the thinking problems, when the cognitive free surface is difficult to grasp the essence, the cooperative learning can be carried out when the confusion of cognition is difficult to distinguish. Above the blade.