1. Baer, J., Baldi, S., Ayotte, K., & Green, P. J. (2007). The reading literacy of US fourth-grade students in an international context results from the 2001 and 2006 Progress in International Reading Literacy Study (PIRLS). (NCES 2008-017). Washington, DC: National Center for Education Statistics, Institute of Education Sciences, US Department of Education.
2. Baldi, S., Ying Jin, Y., Skinner, M., Green, P. J., & Herget, D. (2007). Highlights from PISA 2006: Performance of US 15-year-olds students in science and mathematics literacy in an international context (NCES 2008-016). Washington, DC: National Center for Education Statistics, Institute of Education Sciences, US Department of Education.
3. The Bill & Melinda Gates Foundation. (2011). Top 10 facts about college readiness. Retrieved March 10, 2011, from http://www.gatesfoundation.org/college-ready-education/Pages/10-fast-facts-college-ready-education.aspx
4. Boe, E. L., & Shin, S. (2005). Is the United States really losing the international horse race in academic achievement? Phi Delta Kappan, 86(9), 688-695.
5. International comparisons and the condition of American education;Bracey;Educational Researcher,1996