Teachers play a key role in influencing the future not only of students, but of the country and world as a whole. What contributes to teacher effectiveness? In this panel discussion, teachers and teacher educator experts discuss what they are doing to support and nurture the professionals who instruct our children. They consider what students need from teachers, the role of assessment in teaching, and the most effective investments to promote professional development. The panel was part of the Global Education Conference, held in partnership with Goldman Sachs and the Stanford School of Education.