In order to ensure normal teaching orde r, prote cting st ude nts ' hea lthy growth, ensuring t hat national (property) is not lost, to prevent or minimize the occurre nce of safety acci dents, follow t he "prevent, re scue each other, e nsure safety and re duce losses" pri nci ple, a ccordi ng to the l ocal conditi ons, make t he management system. 1, t he pri nci pal is the responsibi lity of sc