California’s Transitional Kindergarten (TK) program provides an additional year of schooling within the K–12 system that aims to prepare children for kindergarten. Launched a decade ago with limited eligibility, the program will be expanded to all four-year-olds by 2025–26. Little is known about TK’s longer-term impact—especially among multilingual students and students with disabilities, who might benefit from early identification. Taking stock of TK’s impact so far can help the state expand it successfully.

This study examines the impact of target setting for non-academic indicators on school quality ratings in CORE districts' elementary schools. The authors found that non-academic measures of school quality vary over time, are not consistently associated with demographics, and are sensitive to small changes in rating thresholds. The results suggest a need for more research on target setting for non-academic indicators in school quality systems.