《中小学数学》(小学版)2010年第6期杨灵君的《“垂直与平行”课堂教学实录与思考》一文。编者在文后提出这样的疑问:“这课能不能上得简单些呢?”初读杨老师的文章,给人感觉教学内容多,累,再读之后却不能不说杨老师考虑周全,课堂上涵盖了“垂直与平行”的一系列知识点,特别是让学生想象平行和垂直从 “Primary and secondary mathematics” (Elementary School Edition) 2010 sixth issue Yang Lingjun’s “” vertical and parallel “classroom teaching record and thinking” one article. Editor in the text after such a question: “This lesson can not be simpler?” “The first reading of Yang’s article, giving people the feeling of teaching content, tired, and then after reading, but can not say Mr. Yang thoughtful , The classroom covers a series of ”vertical and parallel" points of knowledge, especially for students to imagine parallel and vertical from