Passage1 Inatraditionalclassroom,much,ifnotmost,ofclasstimeisspentwiththeteacherpresentingcontent-telling,showing,explainingandlecturing．Whetherit’safirst-gradeteacherreadingtostudents,ahighschoolgovernmentteacherlecturingontheArticlesofConfederation,oramathteacherdemonstratinghowtosolveanequation,classtimeiswhentheteacherdeliversinformationandthestudentsreceiveit Ideally,lessonsinvolveamixtureofdeliveryanddiscussion,supplementedbyactivitiesthatengagestudentstosupporttheircomprehension．Butinreality,justgettingthecontentacrosscantakemostoftheclassperiod,especiallywhenlessonsareinterruptedbystudentquestions,disciplineproblems,anddistractionslikefiredrills,assemblies,andotherdisruptions. Therearelotsofgoodreasonsforthismodelanditsdurabilityineducation．Itisanefficientwaytoassurethatallstudentshaveaccesstothesamecoursecontent,anditprovidesawayforteacherstotransmittheirexpertiseinasubject,andenthusiasmforit,totheirstudents．Mostteacherslovebeingthe“sageonthestage”,andmanyareverygoodatit. Nevertheless,manyteachersalsofeelfrustratedbythelimitationsofthismodel,especiallywhenlectureandpresentationtakeupthelion’sshareoftheclassperiod,leavinglittletimeforthegoodstuffofteaching—gettingintostudents’,helpingthemmakemeaningoutofinformation,drawingouttheirevolvingunderstanding,encouragingandsparklingtheirexcitementandcomprehension．Intoday’senvironmentofhigh-stakestesting,withmultiplestandards—andnowwiththeCommonCore,newstandards—thereneverseemstobeenoughtimeforallthethingsteacherswishtheycoulddowiththeirstudents:project-basedactivities,individualorgrouplearningchallenges,deepdiscussionsandinquiryactivities. Soit’snotsurprisingthat,whenteachersareaskedwhattheybelieveisthegreatestvalueofflippinginstruction,theanswerisalmostalways,“Itgivesmemoretimetoworkdirectlywithstudentsduringclass.”TeachersatMichigan’sClintondaleHighSchoolclaimthat,sincetheyhaveflippedtheirclassrooms,theamountoftimetheyspendwithstudentshasincreasedbyafactoroffour．Thatissubstantialgain—anditmakesarealdifferenceinstudentsbelievingthattheteacheristhereforthemwhenhelpisneeded. Accordingtothepassage,whatdifferentiatesaflippedclassroomfromatraditionalone?
A.The amount of time that teachers spend with individual students. B.The amount of knowledge that teachers impart to students. C.The content of the teaching materials used by teachers. D.The variety of activities organized by teachers.正确答案A
