The National Education Commission on Time and Learning (NECT&L) is an independent advisory body, authorized by the United States Congress through Public Law 102-62, the Education Council Act of 1991. The commission is undertaking a comprehensive review of the relationship between time and learning in elementary-secondary education, including international comparisons, the use of time in and out of school, the use of facilities, year-round professional opportunities for teachers, and the estimated costs of adopting longer school days and longer school years. This document summarizes proceedings of a hearing to discuss the professional development of teachers. Themes that emerged during the discussions included time management, school restructuring, professional development schools, and the human dimension. A list of participants is included. The appendix describes a site visit to Cornerstone School, an interdenominational religious school administered by the Roman Catholic Archdiocese of Detroit (Michigan). (LMI)