EDFacts School Improvement Grant, 2011-12 (EDFacts SIG:2011-12), is one of 17 'topics' identified in the EDFacts documentation (in this database, each 'topic' is entered as a separate study); program data is available since 2005 at . EDFacts SIG:2011-12 (ed.gov/about/inits/ed/edfacts) annually collects cross-sectional data about students, teachers, principals, and schools from states to monitor and report performance on the School Improvement Grant (SIG) program at the school levels. EDFacts SIG:2011-12 data were collected using the EDFacts Submission System (ESS), a centralized portal and their submission by states is mandatory and required for benefits. Not submitting the required reports by a state constitutes a failure to comply with law and may have consequences for federal funding to the state. Key statistics produced from EDFacts SIG:2011-12 are from 14 data groups with information on Advanced Coursework, Dual Enrollment, Advanced Coursework/Dual Enrollment, Average Scale Scores, Increased Learning Time, Intervention Used, School Year Minutes, Student Attendance Rate, Teacher Attendance Rate, Persistently Lowest-Achieving Schools, Principal Evaluations, Principal Performance Level Names, Teacher Evaluations, and Teacher Performance Level Names. For the purposes of this system, data groups are referred to as 'variables', as a result of the structure and format of EDFacts' data.