如果教师对某一堂课所讲的内容理解得不深,掌握得不好,那他在讲课时就会出现思路不清,讲解不透,前后矛盾等现象,有时甚至中途卡壳。对一堂课是这样,对整门课程更是这样。实践证明,大凡教学效果不好,学生不满意的教师,十之八九是由于对教材内容吃得不透所造成。吃透教材内容是讲好课的关键,也是备课阶段的中心任务。一般说来,教学秩序稳定以后,对某门课程的选用教材都是事先已经确定了的,因此,在备课阶段,就应该对所选定的教材下功夫,这是讲好课的 If teachers do not understand the contents of a class to understand deep, poorly mastered, then he will appear in the lecture when thinking is not clear, inconsistent explanation, inconsistencies and other phenomena, and sometimes even midway. This is the case for a lesson, especially for the whole course. Practice has proved that, generally, the teaching effect is not good, students are not satisfied with the teacher, nine out of ten is due to the contents of the teaching material caused by impermeability. Inspired teaching material content is the key to good class, but also the preparation phase of the central task. In general, the stability of the teaching order, the selection of a course of teaching materials have been identified in advance, therefore, in the preparation phase, it should be on the selected textbooks, this is a good lesson