新课教学的第一个环节是引入 ,4 5分钟一堂课 ,重在引入 ,难在引入 ,成败的一半在引入 .怎么引入新课 ,是整个教学设计中必须特别注意的 .一个好的新课引入应是新、旧知识的纽带 ,承上启下的桥梁 .一个好的新课引入 ,更应能启迪学生想象力 ,引发学生学习兴趣 ,激励学生探索新知 The first part of the new lesson is the introduction of teaching, 45 minutes a lesson, focusing on the introduction, it is difficult to introduce, half of the success or failure in the introduction. How to introduce new classes, the entire teaching design must pay special attention. A good new Class introduction should be the link between new and old knowledge, link up and down the bridge. The introduction of a good new class should be able to enlighten the imagination of students, arouse students’ interest in learning, and encourage students to explore new knowledge.