6Carless, D. prospects for the implementation of assessment for learning[ J ]. Assessment in Dducation,2005 ( 12 ) :39 - 54.
7Torrance, H. formative assessment: some theoretical problems and empirical questions [ J ]. Cambridge journal of education, 1993 (23) :333 - 344.
8Black, P. , Harrison, C. , Lee, C. , et al. Assessment for learning: Putting it into practice [ M ]. Berkshire, England : Open Unicersity Press ,2003.
