板书是指教师在课堂上为了辅助教学而写在黑板上的文字、画在黑板上的图表或其他的符号等。板书对于课堂教学意义重大,板书设计得好坏,会直接影响到课堂的教学效果。课堂板书设计时,一般把黑板分成左、右两部分或左、中、右三部分。左面部分或左、中部分为主板书,右面 The blackboard is the text that teachers write on the blackboard in order to assist teaching in the classroom, the chart or other symbols drawn on the blackboard. The importance of writing a book for the classroom teaching, writing a good or bad design of the writing board will directly affect the teaching effect in the classroom. Classroom writing design, the general blackboard is divided into left and right two parts or left, middle and right three parts. Left part or left, middle part of the main board book, right