LINDA DARLING-HAMMOND is professor of education at Stanford University and codirector of the National Center for Restructuring Education, Schools, and Teaching (NCREST) at Teachers College, Columbia University. She is also executive director of the National Commission on Teaching and America's Future. ARTHUR E. WISE is president of the National Council for Accreditation of Teacher Education (NCATE). STEPHEN P. KLEIN is a senior research scientist at the RAND Corporation.