Blank, R. K. ., D. Langesen, E. Laird, C. Toye, and V. Bandeira de Mello. “Meeting NCLB Goals for Highly Qualified Teachers: Estimates by State from Survey Data”. Education Policy Analysis Archives, vol. 12, Dec. 2004, p. 70, doi:10.14507/epaa.v12n70.2004.