Percentage of Public School Teachers Who Taught Elementary Grades with an Undergraduate or Graduate Certification Major and In Their Main Assignment Field, 1999-2000
Source: U.S. Department of Education, National Center for Education Statistics.
Qualification of the Public School Teacher Workforce: Prevalence of Out-of-Field Teaching, 1987-88 to 1999-2000, NCES 2002-603, by Marilyn McMiellen Seastrom, Kerry J. Gruber, Robin Henke, Daniel J. McGrath, and Benjamin A. Cohen. Washington, DC: 2002.