Study Times, the journal of the Party School of the Communist Party reported that from 1990 to 2004, schools in 90 counties were damaged during earthquakes. In 2003 alone, over 420,000 students could not attended classes due to damages to schools. Study Times cited most recent examples including over 700 students in Juyuan middle school in Dujiangyan City who were buried and died during the Sichuan earthquake on May 12, 2008. The article attributed these casualties to dangerous school buildings.
Source: Study Times, May 21, 2008