【案例背景】课堂导入是整个课堂教学中十分重要的环节。它既是课堂教学的有机组成部分,又是激发学生学习兴趣及求知欲的关键。常言道“万事开头难”。一个紧扣课本话题,新颖活泼,形式多样的导入,就像一股清泉,沁人心脾,它能够吸引学生的注意力,激发学生强烈的求知欲和好奇 【Case Background】 Introduction to the classroom is a very important part of the entire classroom teaching. It is not only an integral part of classroom teaching, but also the key to stimulate students’ interest in learning and curiosity. As the saying goes “everything is hard at the beginning”. A topic closely linked to textbooks, novel and lively, diverse forms of imports, like a spring, refreshing, it can attract students ’attention and stimulate students’ strong curiosity and curiosity