急求英语作文，以学生会名义写一则应急通知。

我献上一篇：Now , I have a information to tell everyone . To improve teachers and students leave classroom and office in hard time , protect ourselves and safety admire . Our headmaster is leader. Teachers and students must get together at 2:28P.M. ,12th, Sem,2010 in the ground .Something we must know :1st, please order the class number from little to large if you want to leave quickly . 2nd ,you must obey the leader's lead . 3rd , please keep quite and don't against our normal rules(常规) when you go through . Safety is the first .欢迎使用！