导入是在新的教学内容或活动开始时,教学引导学生进入学习的行为方式,它能将学习者的注意力吸引到特定的教学任务和程序之中,激发学习兴趣,明确学习目的,建立知识间的联系。实践证明,不同的定向导入对学习效果有不同的影响,“善导”的教师,在教学之始,就能诱发出学生渴望获得知识,不断追求真理的意向,下面是化学课堂教学中常用的导入方法: Introducing is a new way of teaching students to enter into learning when new teaching contents or activities begin. It can draw attention of learners to specific teaching tasks and procedures, stimulate interest in learning, clarify the purpose of learning, and establish knowledge The connection between. Practice has proved that different directional induction have different effects on learning effectiveness. Teachers of “good guidance” can induce students' desire to acquire knowledge and constant pursuit of truth at the beginning of teaching. The following are commonly used in chemistry class teaching Import method: