In order to ensure normal teaching orde r, pr otecting students ' he althy growt h, ensuri ng that nati onal (pr operty) is not lost, t o preve nt or minimize the occurrence of safety accide nts, follow the "preve nt, rescue ea ch ot her, ensure safety and reduce l osses" principle , accordi ng to the local conditi ons, make the management system. 1, t he pri ncipal is the responsibility of school