操作学具应做到“三适”王淑英１．操作要适当。教学中，教师应根据教材的内容、要求以及学生的知识水平来确定是否需要操作。如教学“６加几”，因为前面学习了９加几、８加几、７加几，对这类题的计算方法已理解掌握，若再进行操作，既浪费时间，又使学生感到枯燥无味，... Operating learning tools should be “three appropriate” Wang Shuying 1. The operation should be appropriate. Teaching, teachers should be based on the content of teaching materials, requirements and the level of knowledge of students to determine whether the need for operation. Such as teaching “6 plus a few”, because in front of learning to add a few 9, 8 plus a few, 7 plus a few, the calculation of such questions have understood the grasp, if the operation is not only a waste of time, but also make students feel dull, ...