Health and wellness are critical elements of teacher performance, attendance, retention, and ultimately, student achievement. While teacher wellness and stress is a nation-wide concern, data suggest that Oakland Unified School District has particularly high levels of teacher stress and a gap in wellness. While there is a growing understanding in the field of the importance for teachers to be well in order to be effective, less research has been conducted about the personal costs to teachers, and the financial costs to the district, when teachers are unwell. Teacher wellness goes far deeper than physical fitness and mental preparedness for work. While these are critical components of a healthy lifestyle and professional success, research on teacher wellness suggests that workplace culture elements like professional development, supportive school administration, decision-making power, and consistent school policies also are large contributors to teacher wellness. Finally, providing individual-level support to teachers to support them emotionally and professionally can help teachers manage their classrooms and students' needs as well as their own health. This report used a mixed methods approach to understand the opportunities, scope, and costs relating to teacher wellness issues in OUSD and examines: (1) What are the opportunities to improve teacher wellness? (2) How much does the lack of teacher wellness cost the district? and (3) What is the impact of teacher wellness on retention and attendance rates?