In or der to e nsure normal teaching orde r, protecti ng student s ' hea lthy growt h, e nsuri ng that national (property) is not lost, to prevent or minimize t he occurrence of safety accide nts, foll ow the "prevent, re scue ea ch other, ensure safety and reduce l osses" pri nci ple, a ccording t o the local condit ions, make t he ma nagement system. 1, the pri nci pal is t he responsi bility