8Valverde, G. and L. Bianchi and R. Wolfe and W. Schmidt and R. Houang. According to the Book: Using TIMSS to In- vestigate the Translation of Policy into Practice through the World of Textbooks[M]. London: Kluwer Academic Publish- ers, 2002:10-13.
9National Research Council. On evaluating curricular effectiveness: Judging the quality of K-12 mathematics evaluations [M]. Washington, DC: The National Academies Press, 2004:65-95.
