苏霍姆林斯基说过“教师必须懂得什么该讲,什么该留着不讲,不该讲的东西,就好比是学生思维的引爆器,马上使学生在思维中出现问题。”教学目标是课堂教学的标杆,是顺利进行课堂教学的基本保证和首要环节。所以课堂教学中,要从一个大的视野来把握学习内容、教师不能什么都自己讲完,要留出给学生思考的空白,给予学生充分思考的 Sukhomlinski said: “Teachers must know what to say and what to leave or not to say is like a detonator of a student’s mind, which promptly causes students problems in their thinking.” " Teaching goal is the benchmark of classroom teaching, is the basic guarantee for smooth classroom teaching and the primary link. Therefore, classroom teaching, we must grasp the learning content from a large field of vision, teachers can not say everything, to give students a blank, to give students full thought