本期发表的四篇中学生习作的作者张缪炜、杨雪、徐颖、丁咚都是江苏南通市第一中学初中二年级的同学,这四篇文章是从该校初二数学兴趣小组主编的内部刊物《学会发现》中选出的(本刊上期已选登过几篇,以后还会陆续选登)．通过阅读这些文章,我们可以看出同学们的数学学习是积极主动的、研究性的、因而也是饶有兴趣的。我们非常感谢该校的符永平老师,是他组织和指导同学们撰写数学小论文,并精心编辑上述内部刊物,这是一件非常有意义的工作,对培养同学们学会学习,提高他们的数学能力和学习兴趣都非常有益．我们祝愿南通一中的《学会发现》能坚持办下去,取得更大的成绩．我们也希望有更多的教师参加到这一有意义的工作中来,希望有更多的学校创办自己的数学小论文刊物．本刊愿意成为各校刊物的一个交流园地． The authors of the four middle school students published in this issue, Zhang Weiwei, Yang Xue, Xu Ying, and Ding Xuan, are the second-year junior high school students in the Nantong No. 1 Middle School in Jiangsu. These four articles were edited by the junior math interest group of the school. Selected in the internal publication “Learning to Discover” (this issue has been selected several times in the previous issue and will be selected later). By reading these articles, we can see that students’ mathematics learning is proactive, research-oriented, and therefore of great interest. We are very grateful to Fu Yongping, the school’s teacher, for organizing and instructing students to write mathematics dissertations and carefully editing the above internal publications. This is a very meaningful job. It helps train students to learn and improve their math skills. And learning interests are very helpful. We wish Nantong’s “Learning to Discover” to persist and achieve even greater results. We also hope that more teachers will participate in this meaningful work and hope that more schools will set up their own small mathematics publications. This publication is willing to become an exchange field for all school publications.