案例背景:在区“教坛新星”选拔赛中,第一天上课的内容是北师大版三年级上册“分桃子”。我所听的几节课虽各有特色,但也具有共性,即创设情境、提出问题、探索新知、解决问题。几位老师都采用动手操作与计算方法相结合这一策略,引导学生列出竖式, Case Background: In the district “teaching altar star ” trials, the contents of the first day of the class is the third edition of Beijing Normal University on the book “points peach ”. Although the courses we listen to have their own characteristics, they also have common features, namely, creating situations, asking questions, exploring new knowledge and solving problems. Several teachers have adopted a combination of hands-on computing and computing strategies to guide students to list the vertical,