板书是课堂教学的重要手段之一。板书和讲课一样，“满堂书”和“满堂灌”都是违背教学规律的。板书不能片面追求详尽，必须注意板书的科学性。小小一块黑板，只要我们研究它、利用它，对提高课堂教学效果会起到很大的作用。 Board writing is one of the important means of classroom teaching. On the other hand, on the board, like lectures, “full books” and “full house irrigation” are contrary to the laws of teaching. A book on the board cannot be unilaterally pursued in detail and must pay attention to the scientific nature of the board. A small blackboard, as long as we study it and use it, will play a great role in improving the effectiveness of classroom teaching.