World Economic Forum. (2006). Switzerland, Finland, and Sweden Take the Lead in the Rankings of the World Economic Forum’s Global Competitiveness Index, but United States Drops. September 26. Available:

Yang, J. (2006). Learners and users of English in China. English Today, 22, 3-10. Available:;jsessionid=3A6A4946D08F15D57A69987D43A12FC4.tomcat1?fromPage=online&aid=433481.

Yoon, K.S., Duncan, T., Lee, S.W.-Y., Scarloss, B., and Shapley, K.L. (2007). Reviewing the Evidence on How Teacher Professional Development Affects Student Achievement. Institute of Education Sciences, National Center for Education Evaluation and Regional Assistance, Regional Educational Laboratory Southwest. Washington, DC: U.S. Department of Education. Available:

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement