An academy is a place for study and teaching, and a "posting" is a set of rules written out and put up for the students to see. With written rules the students knew what to do and what to keep to.
In the Chunxi era of the Southern Song, Zhu Xi rebuilt the White Deer Grotto Academy and issued its Articles of Learning, establishing the tradition of academy regulations.
Under the Yongzheng Emperor of the Qing an edict ordered an academy in every provincial capital, bringing academies under official funding, and they spread widely.
In 1901, the twenty-seventh year of Guangxu, a Qing edict converted the academies everywhere into modern schools, and the traditional academy system came to an end.
Academy Regulations is the class in the chapter on Education on the rules of the academies. It covers Zhu Xi of the Southern Song rebuilding the White Deer Grotto Academy and issuing its Articles of Learning, the Yongzheng-era Qing bringing academies under official funding, and the edict of 1901 converting the academies into modern schools.