Frazier Healthcare Partners, a Seattle-based healthcare private equity firm, completed a growth investment in Effective School Solutions (ESS), a leading provider of school-based mental health solutions that help school districts improve the mental health of K-12 students. Serving more than 100 school districts across nine states, ESS offers a full suite of multi-tiered mental health solutions, rigorous clinical supervision and quality management to help students make therapeutic progress and districts achieve long-term financial sustainability.