Exhibit ES.11. Averaged freshman graduation rate of school-age youth identified for services under IDEA and total population, by state (2005 and 1998–2004 average)
Exhibit reads: In Louisiana, 17 percent of the estimated enrollment of students identified for IDEA services 4 years prior to 2005 graduated with a regular diploma in 2005.
NOTE: States are ordered by the graduation rate of youth identified for services under IDEA in 2005. Vertical lines represent national rates. The Averaged Freshman Graduation Rate (AFGR) uses aggregate student enrollment data to estimate the size of an incoming freshman class and aggregate counts of the number of graduates 4 years later. For a given year, the freshman class size four years prior is estimated by summing the enrollment in 8th grade 4 years prior, 9th grade for the next year, and 10th grade for the year after and then dividing by 3. The averaging is intended to account for higher grade retentions in the 9th grade. To calculate the AFGR, the number of diplomas awarded ina year serves as the numerator, and the averaged freshmen class enrollment serves as the denominator (for more information about the use of the AFGR for the general population, go to: http://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2008053). Using data from the Common Core of Data (CCD), the formula for calculating the AFGR for youth in the total population is shown below.
AFGR formula for youth in the total population for 2005-06 school year:
Regular High School Diplomas Awarded at End of 2005-06 School Year
Enrollment in (Grade 8 in fall 2001 + Grade 9 in fall 2002 + Grade 10 in fall 2003)/3
SOURCE: U.S. Department of Education, Office of Special Education Programs, Data Analysis System (DANS), Part B, 1997– 2005, retrieved April 19, 2008, from http://www.ideadata.org; U.S.Department of Education, National Center for Education Statistics, Common Core of Data, 1997–98 to 2005–06, retrieved December 10, 2007, from http://www.nces.ed.gov/ccd/bat/.