National Board Certification has some impact
Teachers who earn advanced certification from the National Board for Professional Teaching Standards are more effective than teachers without that credential, but there’s little evidence to show the program has transformed the field in the broader ways its founders envisioned.
Hakel, W., Koenig, J., & Elliott, S. (2008). Assessing Accomplished Teaching: Advanced-Level Certification Programs. Washington, DC: Committee on Evaluation of Teacher Certification by the National Board for Professional Teaching Standards, National Research Council.