The Race to the Top and the School Improvement Grant programs provide resources to States to implement significant interventions to turn around their persistently lowest achieving schools. Implementation of school turnaround is a complex effort; States, local educational agencies (LEAs) and schools often engage outside experts and providers of specialized services to bring additional capacity and assist with implementation. In doing so, it is essential for schools, LEAs and States to initiate a process to ensure the high quality of the services provided by external partners. The purpose of this publication is to describe the varying approaches that some Race to the Top States have taken and to provide examples of safeguards that States are using to maximize the number of available providers while ensuring that they are supplying high-quality services.