1 Barton, Paul E. (2003). Parsing the Achievement Gap: Baselines for Tracking Progress. Educational Testing Service, Policy Information Center. Retrieved May 12, 2009, from http://www.ets.org/Media/Education_Topics/pdf/parsing.pdf.
2 McKinsey & Company (April 2009). The Economic Impact of the Achievement Gap in American’s Schools. Retrieved May 12, 2009, from http://www.mckinsey.com/clientservice/socialsector/achievementgap.asp.
3 McKinsey & Company (April 2009). The Economic Impact of the Achievement Gap in American’s Schools. Retrieved May 12, 2009, from http://www.mckinsey.com/clientservice/socialsector/achievementgap.asp.
4 McKinsey & Company (April 2009). Detailed findings on the economic impact of the achievement gap in America’s schools. Retrieved May 12, 2009, from http://www.mckinsey.com/clientservice/socialsector/detailed_achievement_gap_findings.pdf.
5 NCLB State Report Card 2007-2008. Texas Education Agency, Division of NCLB Program Coordination (2009). Retrieved May 12, 2009, from http://ritter.tea.state.tx.us/nclb/PDF/2007-08StRepCrd.pdf/