教学内容:“10加几和相应的减法”是苏教版小学数学第一册的内容,是在学生掌握了11~20各数的读、写,初步认识“十位”和“个位”,知道了十位上的1表示1个十,个位上的几就表示几个一的基础上进行本节课的教学。以下是甲乙两位老师执教这节常规口算课的教学片段对比设计。片段一 Teaching content: “10 plus a few and the corresponding subtraction” is the content of the first edition of the Supian version of primary school mathematics, is to master the students read and write the number of 11 to 20, a preliminary understanding of the “ten” and “a bit” , Know that the 1 on the top of a said a ten, a few bits on the basis of a few that the teaching of this lesson. The following is a teacher A and B two coaches teach this section of the conventional oral education section contrast design. Fragment one