These are schools where 50% or less of the students passed any of the different TAKS tests in any two out of the three years - 2009, 2010 and 2011 or the school was rated Academically Unacceptable in 2011, 2010 or 2009. Parents can transfer their children out of these schools (although few do due to lack of transportation).
This list has been updated for 2015-2016 here:
http://dallas-area-schools.blogspot.com/2014/12/2015-2016-worst-schools-list-peg-list.html
This list has been updated for 2014-2015 here:
http://dallas-area-schools.blogspot.com/2014/01/2014-2015-worst-schools-peg-list-dallas.html
Arlington ISD
Hutcheson Jr High
Lamar High
Morton Elementary
Nichols Jr High
Roquemore Elementary
Sam Houston High
Shackelford Jr High
Cleburne ISD
Cleburne High
Dallas ISD
A Maceo Smith High
Blanton Elementary
Franklin Middle
Storey Middle
Bryan Adams High
Hulcy Middle
Carter High
Comstock Middle
Cary Middle
Titche Elementary
Kiest Elementary
Conrad High
Medrano Middle
Roosevelt High
Florence Middle
Douglass Elementary
Spruce High
Holland at Lisbon Elementary
Hillcrest High
Long Middle
Ervin Elementary
Ray Learning Center
Lowe, Sr. Elementary
Madison High
Hood Middle
Runyon Elementary
Frazier Elementary
Kimball High
Pinkston High
McShan Elementary
Lincoln High
North Dallas High
Holmes Middle
Hill Middle
Mills Elementary
Conner Elementary
Tasby Middle
Seagoville High
Seagoville Middle
Browne Middle
Marsalis Elementary
Samuell High
Woodrow Wilson High
Ennis ISD
Ennis High
Ennis Jr High
Garland ISD
South Garland High
Grand Prairie ISD
Arnold Middle
Grand Prairie High
Grand Prairie 9th Grade Center
Kennedy Middle
Keller ISD
Caprock Elementary
Lancaster ISD
Lancaster Middle
McKinney ISD
McKinney High
Plano ISD
Armstrong Middle
Terrell ISD
Wood Elementary
Furlough Middle
Long Elementary
Terrell High
Source: Texas Education Agency PEG List