1999 won the first prize of the first provincial high school mathematics excellent course and the first national high school mathematics excellent course in 2000. The lecture video was released as an audio-visual teaching material of People's Education Press. 200 1 Up to now, he is the competition coach of the provincial mathematics association, the leader of Zhejiang Province in the 2002 national mathematics final, the leading member of the provincial primary school mathematics research group, and the leader of the municipal mathematics teaching evaluation group. He is a member of the evaluation group of senior professional titles in Hangzhou, and a member of the expert database of college entrance examination and examination in Zhejiang Province. In 2003, 2004 and 2005, I participated in the provincial examination proposition work for three consecutive years. Cai has been actively exploring and practicing for a long time, paying special attention to the cultivation of innovative talents. We have made some achievements in the subject competition counseling and the cultivation of outstanding students in mathematics, and gained a certain popularity both inside and outside the province. Since 0 1, all three math competition teams have won the top three in Zhejiang province, among which seven students were selected for the final of the national winter camp and won five silvers and two bronzes. The first prize of the National League was awarded to Tsinghua Peking University 19, focusing on team building. He is good at class management. In 2006, he served as the head teacher of the graduating class. Together with other teachers, he created a class, and 50% of the students walked or passed the college entrance examinations of Peking University and Tsinghua. Among them, Lu Yi won the top prize of science in Zhejiang College Entrance Examination in 2006, which filled the gap of the top prize of science in No.2 Middle School for a century. CCTV 3, Zhejiang TV, qianjiang evening news, Hangzhou Daily and other media reported related stories.

Cai Qin is good at theoretical research and action research. More than 80 educational and teaching papers have been published in 25 periodicals at or above the provincial level, such as Mathematics Bulletin, Reference of Mathematics Teaching in Middle Schools, Mathematics Newsletter and Teaching Monthly, and many of them have been reproduced in full by the newspaper copying center of Renmin University. Representative works include "Exercise teaching should pay attention to crossing simple linear thinking mode", "Open class should show its true colors in key points", "Key points of college entrance examination review", "Hidden educational function of mathematics in new curriculum teaching" and "Exploration of teaching strategies for training mathematical talents under the new curriculum concept". The two topics won the first prize and the second prize of the key project of "Double Hundred Talents" in the city respectively, and many papers won excellent papers. Among them, national first prize 1, third prize 1, provincial first prize 1, second prize 1, and municipal first prize 1. Personal monographs include "Higher and Better Mathematical Thinking Methods in Senior High School" and "Algebraic Deformation".

Cai is pragmatic and pays attention to the cultivation of young teachers. He has coached more than 20 young teachers in Zhoushan, Huzhou, Lishui and Hangzhou, becoming the backbone of local teaching. In recent years, he has been invited to write teaching research papers, evaluate teaching highly, hold mathematics competitions in middle schools, train outstanding students in middle schools and train young teachers in middle schools, which has been widely praised.