The Midwest Child-Parent Center (CPC) Expansion began preschool implementation in fall 2012 in 5 Minnesota and Illinois districts. This study reports preschool and kindergarten impact findings for the Saint Paul Public School District. It is the first impact study of CPC outside of Chicago. After documenting that implementation quality was relatively high on the 6 CPC elements (effective learning, collaborative leadership, aligned curriculum, parent involvement, professional development, and continuity and stability), matched-group analyses of 433 students utilizing propensity score weighting indicated that CPC participants had significantly higher levels of language and literacy proficiency in both preschool and kindergarten than comparison-group participants in the usual district preschool and kindergarten programs. (author abstract)