1.课前抢答练。在常态课堂教学中,我们可以结合学习内容,有针对性地设计十几道口算题,充分利用课前的几分钟,和学生们一起来一个口算抢答练习。教师利用小卡片或者多媒体向学生依次出示口算题,看哪个同学(或者小组)计算得快。这样做,不仅训练了学生的心算能力,同时也可以起到复习旧知、激活思维的作用,为新知识的学习打下良好的基础。 1. Catch a class before class. In the normal classroom teaching, we can combine the learning content, design a dozen crossroads, make full use of a few minutes before class, and students together to a mouth to answer the answer exercises. Teachers use small cards or multimedia to show students in turn the mouth of the problem, to see which students (or group) calculated quickly. In doing so, we not only train students’ mental abilities, but also play the role of reviewing old knowledge and activating thinking so as to lay a good foundation for new knowledge learning.