10 1 The online school is one of the online schools with the largest number of teachers and the largest number of users. It is taught by more than 4,000 first-line excellent teachers all over the country, providing synchronous courses and answering services for network members. These teachers come from: Beijing 10 1 middle school, Shangdi Experimental Middle School (1kloc-0/branch school), Middle School Attached to Peking University, Beijing No.4 Middle School, Primary School Attached to Beijing Normal University, Middle School Attached to Shoushi Normal University and Beijing16/middle school.