5Thomas S, Peng W J, Gray J. Modeling patterns of improvement over time:value-added trends in English secondary school performance across ten cohort. Oxford Review of Education, 2007,33 (3) : 261 -- 295.
6Assessment Reform Group. Assessment for Learning:lO Principles. Cambridge: University of Cambridge, 2002.
7Black, P.& WIliam, D. Inside the Black Box: Raising Standards Through Classroom Assessment . British Edueational Researeh Assoeiation, BERA, 2002.
8Black, P. & Wiliam, D. Assessment and Classroom Learning. Assessment in Education, 1998,5 ( 1 ) : 7 -- 74.
9Sheehan, K. M. A tree-based approach to proficiency scaling and diagnostic assessment. Journal of Educational Measurement, 1977,34:333--352.
