The Arkansas Better Chance (ABC) program longitudinal study (2009-2020) reviews the changing circumstances and outcomes of participation in Pre-K services in Arkansas. The "core comparison" of this study is between ABC participants and students who had no known Pre-K participation but have similar household income levels. The results show that ABC participants generally have better attendance rates in kindergarten, elementary, and secondary school, as well as lower rates of chronic absenteeism, higher persistence, and higher proficiency percentages compared to students of similar socioeconomic status who had no known Pre-K services. The study also reviews the change over time in special education services for ABC participants and examines changes in the type of Pre-K services used as well as changes in meal status designation for kindergarten students. [For "Arkansas Better Chance (ABC) Program Longitudinal Study (2009-2019)," see ED611083.]