"The NBPTS has the potential to make a valuable contribution to efforts to improve teacher quality, together with other reforms intended to create a more effective environment for teaching and learning in schools, increase the supply of high-quality entrants into the profession, and improve career opportunities for teachers. Our review of the research, however, suggests that there is not yet compelling evidence that the existence of the certification program has had a significant impact on the field, teachers, students, or the education system. We note, however, that much of the research needed to evaluate these impacts has not been conducted, in part because the necessary data have not been collected. Moreover, revolutionary changes of the kind the board’s founders envisioned would be expected to develop over decades, not years. The founders also intended, as we have repeatedly stressed, that the certification program would be supported by an array of other reforms, many of which have not been implemented. This evaluation thus provides an opportunity to take stock of what has worked well and what has not and to consider changes that are needed to respond to the current policy environment."
http://www.nap.edu/openbook.php?record_id=12224&page=261 "COST-EFFECTIVENESS OF THE PROGRAM
To estimate the cost-effectiveness of the NBPTS program, we combine the information on the benefits and the information on the costs from the preceding two sections. As stated in Conclusion 11-1, there is no conclusive evidence yet that board certification directly improves the teaching practices of candidates or that it has led to the improvements across the educational system in the ways enumerated (in Benefits 3a through 3f). As a result, there is little evidence that we can use for a cost-effectiveness analysis. However, board certification does offer a way of identifying high-quality teachers, and the difference between board-certified teachers and nonapplicants reported in value-added analyses provides a quantitative estimate that can be used in cost-effectiveness analyses. "
http://www.nap.edu/openbook.php?record_id=12224&page=223http://www.nap.edu/openbook.php?record_id=12224&page=R1Assessing Accomplished Teaching
Advanced-Level Certification Programs
Committee on Evaluation of Teacher Certification by the National Board for Professional Teaching Standards
Milton D. Hakel, Judith Anderson Koenig, and Stuart W. Elliott, Editors
Board on Testing and Assessment
Center for Education
Division of Behavioral and Social Sciences and Education
NATIONAL RESEARCH COUNCIL OF THE NATIONAL ACADEMIES
THE NATIONAL ACADEMIES PRESS
Washington, D.C.