The study investigates the relationship between professional teaching and students' mental health in public and private schools, highlighting the crucial role of qualified teachers in fostering holistic development. It identifies four key themes: teacher profiles, professionalism and mental health knowledge, teaching competence, and challenges in practicing professionalism, showing variances between public and private institutions. The findings indicate that while professionalism leads to better student outcomes, significant challenges remain, particularly concerning individual student attention and the integration of mental health awareness in pedagogy.