去年,在教学《公倍数与公因数》时,依纲据本,严格按照教材顺序和教参要求精心设计教案。然实践过后,费了相当工夫,学生掌握仍不理想。由于这部分知识点薄弱,直接影响到后面的约分和通分、分数加、减法乃至分数乘法的计算,我不禁对本单元教材的编排设计产生了质疑。 Last year, when teaching “the common multiple and the common divisor”, according to the basis of this book, in strict accordance with the teaching material order and teaching requirements carefully designed lesson plans. However, after practice, spent a lot of time, students still not ideal. Due to the weakness of this part of the knowledge, which directly affects the later points and points, the calculation of fractional addition, subtraction and even fractional multiplication, I can not help but question the orchestration design of the unit teaching materials.