In order to ensure normal teaching orde r, prote cting st ude nts ' hea lthy growth, ensuring t hat national (property) is not l ost, to prevent or minimize the occurrence of safety accide nts, foll ow the "preve nt, rescue ea ch other, ensure safety and reduce losses" pri nci ple, accor ding to t he local conditions, make the manag ement system. 1, t he pri nci pal is the re sponsi bility of scho