|Figure 9-2: Percentage of students ages 6-21 served under the Individuals with Disabilities Education Act (IDEA), Part B, placed in a regular school environment, by amount of time spent in general classes: Selected school years, 1990-91 through 2009-10|
NOTE: Includes children and youth in the 50 states, the District of Columbia, and the Bureau of Indian Education schools. Data for 2007–08 and 2008–09 do not include Vermont. Detail may not sum to totals because of rounding. For more information on student disabilities, see Appendix C – Commonly Used Measures.
SOURCE: U.S. Department of Education, Office of Special Education Programs, Annual Report to Congress on the Implementation of the Individuals with Disabilities Education Act, selected years, 1990 through 2009; and Individuals with Disabilities Education Act (IDEA) database, retrieved September 14, 2011, from http://www.ideadata.org/PartBdata.asp.