全国小学数学优化课堂教学第四届观摩交流会于 １９９９年 １０月１３日至 １８日在河南省洛阳市举行。来自全国各省市的３１位优秀小学数学教师上了观摩课。参加会议的教师分两个会场，多达４０００余人，这是全国小学数学教育界世纪末的一次盛会，也是落实第三次全国教育工作 The Fourth National Symposium on Mathematics Optimization Class Teaching in Primary Schools was held in Luoyang, Henan Province from October 13 to 18, 1999. 31 outstanding primary school mathematics teachers from various provinces and cities nationwide attended the observation class. Teachers participating in the conference are divided into two venues, with more than 4,000 people. This is a grand occasion for the end of the century in the field of mathematics education in primary schools across the country. It is also the third national education project