School improvement models are expanding to incorporate priorities around positive youth development, safe and supportive school climates, school mental health, and school-family community partnerships. A partnership was formed between researchers and district/school leaders to examine the 3-year adoption and implementation of 1 such exemplary model, the Ohio Community Collaboration Model for School Improvement, in a Midwest urban district serving a large number of students at-risk. Researchers and district/school leaders examined what types of system-level capacities developed, and explored student- and school-level outcomes that occurred over the course of implementation. Multiple innovations resulted, such as strengthened policies, improved partnerships and collaborations, and enhanced funding streams. Students' perceptions of academic press, school climate, and academic motivation improved over the 3 years. Academic report cards show progress toward districtwide improvement. Implications are drawn for researchers and school leaders, especially in relation to the design, implementation, and evaluation of collaborative models of school improvement.