本文从一堂市级说明文教学公开课谈起,截取相关片段,和程翔老师的《中国石拱桥》教学实录进行比较,试图探寻一条实用文阅读向写作拓展的路径,指出在实用文的阅读教学中,我们需要不停地追问:为什么这样写?如何才能这样写?在不停地追问中让学生的思维走向深刻,走向文本的深水区,在学生知其然的同时,更能知其所以然,久而久之,学生在潜移默化中才会拥有这把开启实用文写作之门的钥匙。 This article from a city level instructional teaching open class, intercepting the relevant segments, and Cheng Xiang teacher’s “Chinese arch bridge” teaching record comparison, trying to explore a practical way of reading to writing expansion path, pointed out that in practical reading teaching , We need to keep asking: Why Write? How can we write? Keep asking students to make the deep thinking toward the text of the deep-water area, students know it at the same time, know more about why they are, As time passes, students subtly acquire the key to opening the door to practical writing.