There is a nationwide concern that too many students leave high school unprepared for college-level coursework and that students lack awareness of their level of preparation. Florida enacted Senate Bill 1908 creating a statewide program, the Florida College and Career Readiness Initiative (FCCRI), to reduce the need for postsecondary remediation. The FCCRI consists of testing 11th-graders statewide to determine their college readiness and requiring those not college ready to take one or more of five college readiness and success (CRS) courses in grade 12. This presentation describes practitioner feedback on program implementation over three years (school years 2012-13 to 2015-16), as well as how collaboration between researchers and practitioners improves the initiative's effectiveness. The authors describe findings from a qualitative evaluation that includes small group discussions with CRS teachers (year 1), two statewide surveys of CRS teachers (years 1 and 2), site visits in six counties (year 2), and professional development forums for educators in three cities (year 3). The findings provide lessons learned about researcher-practitioner partnerships that can inform practice, and also provide additional information that can help states and districts in determining how to structure supports for similar programs. Figures are appended. [SREE documents are structured abstracts of SREE conference symposium, panel, and paper or poster submissions.]