Social and emotional learning (SEL) is critical to the success of students of all ages--and for educators across all stages of the career continuum. Because SEL skills take time to develop and mature, they should be part of the content addressed in teacher preparation programs, beginning teacher support, and ongoing teacher professional learning. However, training and support for SEL are rare at all of these levels. One powerful way to create effective and meaningful SEL learning across the teacher professional development continuum is through a university-district partnership. This is the approach taken by the Center for Reaching & Teaching the Whole Child together with San José State University and Sunnyvale School District in California. These three partners use student teacher placements to build SEL capacity in two generations of teachers simultaneously. They lead professional learning with cooperating teachers--district teachers who serve as supervisors for teacher candidates' student teaching experiences. Feedback suggests that participants consider the approach helpful in developing an understanding of and competence in SEL.