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下面的图片是苏教版小学数学一年级上册“11-20各数的组成和写数”的一节新课内容。教材是想让学生经历“用小棒表示数——用计数器表示数——用数字表示数——理解数的组成”的过程,体会数学抽象过程,发展直观思维和简单的抽象思维能力。可是学生想要借助计数器来认识十几的两位数,仍然缺少在计数器上从一位数过渡到两位数的认识过程,所以本节课的教学还是存在挑战性的。下面是我在教学这部分内容时的一些做法,想与同行们一起交流。
The following picture is a new version of the content of the first lesson of the first edition of the Supian version of elementary school mathematics “composition and write number of 11-20 each number ”. Textbook is to let students experience “with a small stick to express the number of - with the number of counters - with numbers that number - to understand the composition of the number ” process, understand the mathematical abstraction process, the development of intuitive thinking and simple abstract thinking ability . However, students want to know more than a dozen double digits by means of a counter, and still lack the knowledge to transition from one digit to two digits on a counter. Therefore, teaching in this lesson is still challenging. Here are some of the things I did when teaching this part of the content and wanted to talk with my colleagues.