WestEd has partnered with the California Commission on Teacher Credentialing to conduct an external formative evaluation of the California Teacher Residency Grant Program (TRGP) since the launch of the TRGP in 2019. The ongoing evaluation is aimed at assisting residency practitioners, technical assistance providers, and policymakers to better understand and support grant progress. This brief draws on existing administrative data to provide a lens into how the TRGP has scaled over its initial years of implementation from its launch in 2019-20 through 2022-23, the most recent year for which TRGP administrative data are available. The brief concludes with recommendations to support the impact of the TRGP in its remaining years.