There is an increasing demand for computer science courses yet a shortage of teachers with the required subject matter expertise. For 10 years, TEALS has helped high schools increase teacher capacity and build long-term and sustainable computer science programs. TEALS partners teachers new to computer science with volunteers with computer science expertise. Teachers in these partnerships learn computer science while team-teaching with volunteers until they are comfortable teaching independently. In this session, participants will learn about the TEALS approach and how they might be able to contribute to TEALS' goal of computer science in every high school.