The participating cities or communities in the Yale National Initiative include those with established Teachers Institutes, those that are planning new Teachers Institute and those that are considering the establishment of such an Institute. Each Teachers Institute engages the serious educational problems associated with low-income communities and a high proportion of racial and ethnic diversity. In New Haven the partnership includes a major private university that does not have a department or college of Education. In Philadelphia the partnership includes a major private university that has a Graduate School of Education. In Pittsburgh the partnership includes a private university focused upon the sciences and a small liberal arts university that has a strong Education program. In Delaware the partnership includes the state's flagship research university and five school districts that span urban, suburban, and rural New Castle County. These Teachers Institutes show that a successful professional development program in the humanities and the sciences can exist in each of these institutional contexts.