Tobemoddenmiddleschoolstudentmeanstohavegoodbehaviou. 　　Firstofall,beagoodchildathome.Weshouldhelpourparenttodosomehouseworkbecauseitisourdutytodoso.Doinghouseworkcanhelpusgrowupandbemoreresponsible.Secondly,Tobeagoodstudentatschool.Weshouldtryourbesttostudyhardandbemodest.Weshouldgetonwellwithothersandtrytohelpothers.Thirdly,tobeagoodpersoninthepublic.Weshouldhavegoodmanners.Suchasalwayswaitinginline,Don'tspitinpublicplaces,Givingseattoelderlyortheyoung.Weshouldprotectourenvironmentandtheanimals.