The estimates provided here are only for school districts identified in the U.S. Census Bureau's school district mapping project. This project's survey asks each state's department of education for a list of all schools districts and their boundaries. The school district boundary update is conducted biennially and identifies school districts that are eligible for Title I funding under the No Child Left Behind Act of 2001.
The population and poverty estimates for each estimate year are produced for all school districts identified in the most recent boundary update at the time the estimates are produced. The 2006 poverty estimates are produced for school districts in existence for the 2005-2006 school year. The 2007 poverty estimates are produced for school districts in existence for the 2007-2008 school year.