成功的课堂教学不仅要求教师对教学内容有科学、生动的讲解，而且还要有良好的新课导入和知识衔接。优秀的导言是中学生物教师必须具备的基本功之一。一、导言的启发性教学不仅是向学生传授知识，更主要的是培养学生的思维能力。在新课的导人知识点的过渡中，教师要善于运用启? Successful classroom teaching not only requires teachers to have a scientific and vivid explanation of the content of the teaching, but also has a good introduction of new classes and the convergence of knowledge. The excellent introduction is one of the basic skills that middle school biology teachers must have. First, the enlightening teaching of the introduction is not only to impart knowledge to students, but also to cultivate students’ thinking ability. In the transition of the introduction of knowledge in the new class, teachers should be good at using Kai?