本设计可称之为一则教学实录 ,行文更贴近于课堂实际 .顺着读下去 ,一种课堂氛围跃然于纸上 ,与教师紧密配合的孩子的音貌时时闪现在你的眼前 .整个过程的展开显得十分自然 .优秀的教学实录是在教师的事先设计的框架内展开的 ,在教师的导演下完成的 ,它也是一种教学设计 .本设计的明显优点是 :充分体现了学生的主体性 ;充分暴露了数学思维活动的过程 ,且处处留给学生以发挥的余地 ,多侧面多视角地引导学生们去领悟它 :相反数是怎么引入的 ;为什么要引入这个概念 ;它是怎么规定的 ;还可以怎样定义它 ;“互为”是什么意思 ;零有没有相反数 .层次分明 ,逐层推进 ,郑老师的课备得较深入 ,教师自身对课题领悟得比较好 ,在教育思想上也比较开放 This design can be called a teaching record, and the writing is closer to the reality of the classroom. Along the way, a classroom atmosphere is vivid on the paper. The child’s voice that closely cooperates with the teacher is always in front of you. The development of the teaching is very natural. The excellent teaching record is developed within the framework of the teacher’s prior design and is completed under the direction of the teacher. It is also a kind of teaching design. The obvious advantage of this design is that it fully reflects the main body of the student. Sex; fully exposed the process of mathematics thinking activities, and left room for students to play everywhere, to guide students through multiple perspectives to comprehend it: how to introduce the opposite number; why to introduce this concept; how it is stipulated How can also define it; “interaction” is what the meaning; zero there is the opposite number. structured, step-by-step advancement, Zheng teacher’s class preparation is more in-depth, teachers themselves have a better understanding of the subject, in the educational thought It is also relatively open