张竞生在北大的6年,即1921年至1926年,是他一生的黄金时代。他在逻辑学、民俗学、人口学、哲学等多种学科的建树大都产生在这个时期。坐能坐得住,跑能跑得开,或著书立说,或演讲社交,一时间,张竞生成为中国思想文化界一位出尽风头的人物。那时的北大,蔡元培任校长,思想自由,学术空气十分活跃;百花竞放,各种学派异彩纷呈。张竞生的成名得益于这样的氛围和土壤。张竞生在北大任教的主要课程有:行为论、逻辑学、风俗学、相对论、孔德学说、社会主义、行为论史、逻辑学史等,并在中法大学、北京孔德学校讲 Zhang Jingsheng six years in Peking University, 1921 to 1926, is the golden age of his life. His achievements in many disciplines such as logic, folklore, demography, philosophy, etc., are mostly produced in this period. Sit and sit, run and run away, or write a book, or social speech, a time, Zhang Jing Sheng became a figure of the limelight in the Chinese ideological and cultural figures. At that time, Peking University and Cai Yuanpei became the principals, their ideology was free and their academic atmosphere was very active. Zhang Jingsheng’s fame benefited from this atmosphere and soil. Zhang Jingsheng taught at Peking University major courses are: behavioral theory, logic, folklore, theory of relativity, the theory of Comte, socialism, behavioral history, the history of logic, and in China and France, Beijing Confucius School