5[2]Kinger,Celeste.Proximal Development in US Foreign Language Education[J].Applied Linguistics,2002(2):240-261.
6[5]MCKENZIE,J.Scaffolding for Success,From Now On[J].The Educational Technology Journal,1999(4).
7[6]Wood,D.J.,J.S.Bruner,and G.Ross.The Role of Tutoring in Problem Solving[J].Journal of Child Psychology and Psychiatry,1976(2).
8[7]Donato,R.Collective Scaffolding in Second Language Learning[A].In J.P.Lantolf and G.Appel (eds.) Vygostkian Approaches to Second Language Research[C].Norwood,New Jersey:Ablex Publishing,1994.
9[8]Krashen,S.D.The Input Hypothesis:Issues and Implications[M].London:Longman,1985.
10[9]Wertsch,J.V.The Concept of Activity in Soviet Psychology:An Introduction[A].In J.V.Wertsch (Ed.),The Concept of Activity in Soviet Psychology[C].New York:M.E.Sharpe,Inc.,1981.