Ontheonehand,ifthelessonismainlylanguage-oriented,suchasoralEnglishclasses,itmakesperfectsensetoletthepupilstakethedriver'sseat.Teachersaremainlyintheclasstofacilitatetheprocess.Afterall,theultimatemeansofacquiringaforeigntongueistospeakit.Furthermore,itisundeniablethatstudentstendtobemoreenthusiastictowardsclassesinwhichtheycanparticipateandinteract.Ontheotherhand,ifthemainobjectiveofalessonisfortheteachertoimpartsomeunderlyingprinciplesregardingacertainsubject,Ibelieveitwillbebeneficialiftheclassisconductedinateacher-centredfashion.Studentscandiscussthesubjectinvolvedonlyaftertheyhavegainedagoodgraspofthefundamentalprinciples.Inaddition,classesofthelecturetypewillprovideteacherswithmorecontrolintermsofthecontentaswellasthepaceofthelesson.
Insummary,frommystandpoints,whichtypeofclasswillbebettersuitedtoserveitspurposeshouldlargelybejudgedonacase-to-casebasis.Ibelievethattheoptimaloutcomecanonlybeachievedthroughacombinationofthetwoforms.(229words)