PUMP-CS (Preparing Urban Milwaukee Pathways in Computer Science) is a researcher-practitioner partnership (RPP) among Milwaukee Public Schools (MPS), Marquette University, the Learning Partnership, and the American Institutes for Research® (AIR®). The partnership's goal is to solidify and strengthen a preK-12 computer science pathway throughout MPS to provide access to high-quality computer science and computational thinking courses and experiences for all public school children in the city, regardless of their race, socioeconomic circumstances, or geographic location. As the PUMP-CS evaluator, AIR participated in regular partnership meetings, periodically measured teachers' and principals' computer science perceptions and practices, and collected feedback on the health of the RPP. The evaluation questions (EQs) driving this work were as follows: (EQ1) To what extent do teachers' and principals' computer science perceptions and practices change across time? (EQ2) To what extent did the quality of relationships within the partnership improve from 2019 to 2023? (EQ3) To what extent has the research produced been relevant, timely, and rigorous? (EQ4) What types of support were put in place to aid the use of the research produced? How timely and useful have these supports been? (EQ5) To what extent has the capacity of the researcher and practitioner partners to engage in partnership work improved from 2019 to 2023? (EQ6) To what extent did the RPP develop and share knowledge, tools, and routines within the district and with the computer science field more broadly from 2019 to 2023?