近几年来,各地中考中经常出现涉及高中知识(文献[1]中称为“涉高题”)解决问题的习题.此类习题在初中阶段完全可以采用初中知识求解,但是,如何在初中学生已有知识经验的基础上探寻解决问题的方法,一直困惑着一线教师;教师在平时的教学中往往为了拓展学生视野、增强学生思维,经常会把“涉高题”投到课堂上.本文笔者通过一次教研活动中一题的解法探讨为例,谈谈对此题的认识. In recent years, high school knowledge (referred to in the literature [1] as the “high-problem item”) has frequently appeared in local examinations to solve problems. Such exercises can be solved in junior high school using junior high school knowledge. However, how can Junior high school students have explored ways to solve problems on the basis of their knowledge and experience. They have always been puzzled by front-line teachers; teachers often tend to expand students’ horizons and enhance students’ thinking in peacetime teaching, often throwing “high-impact questions” into the classroom. In the article, the author discusses the solution of a problem in a teaching and research activity as an example to discuss the understanding of this topic.