In order to ensure normal tea ching order, pr otecti ng students ' healthy gr owth, e nsuring that national (property) is not l ost, to prevent or minimize the occurr ence of safety accide nts, foll ow the "pr event, re scue each ot her, e nsure safety and re duce l osse s" principle , according to the local conditions, make t he manageme nt system. 1, the pri nci pal is the responsibility of scho