The interim report is part of a five-year national implementation evaluation (2008-13) focused on the first two cohorts of the Teacher Incentive Fund (TIF) grantees. This report is guided by a document review of proposals and reports, phone interviews with key project staff, teachers, and principals from grantees, and site visits to 12 grantees. Our findings highlights the main characteristics or components of TIF performance pay plans in terms of strategies, targets and size of award. It also discusses system supports and broader contextual factors that impede or enhance implementation of performance pay systems. Finally it indicates what prospects are for sustainability of the programs beyond the life of the grant.