编者按：近年来，我国的数学教育研究工作迅猛发展，并取得了丰硕成果．与之相应，全国各地的教研、教改活动也非常活跃，成绩卓著．但是，我们同时也看到，不少中学数学教师仍苦于手头资料缺乏，信息不灵，而不知从何做起．为了改善这种局面，帮助广大中学数学教师较快地提高 Editor’s note: In recent years, the research work on mathematics education in China has developed rapidly and has achieved fruitful results. Correspondingly, teaching and research reforms and educational reforms across the country are also very active and outstanding. However, we also saw that many middle school mathematics teachers still suffer from lack of information at hand, and that they do not know where to start. In order to improve this situation, to help the majority of middle school mathematics teachers to improve faster