教师授课离不开黑板,它不仅是课堂教学的直观教具之一,也是教师讲课的道具。上课时,学生的目光除了集中在教师和书本上外,最容易引起他们注意的就是黑板的板书。板书用文字和图表的形式,能概括教师的讲解,补充教师语言的不足, Teachers can not do without blackboard teaching, it is not only one of the visual teaching aids in classroom teaching, but also the props of teachers lectures. In class, the eyes of students in addition to focus on teachers and books, the most likely to draw their attention is the blackboard blackboard. Board writing in the form of text and charts, teachers can explain the generalization, lack of teacher language supplement,