National Board Certification is the highest symbol of teaching excellence. Teachers pursue National Board Certification to strengthen their teaching practice, improve student learning, and advance their careers. The certification provides a portable teaching license and is available in various subject areas like English, math, science, and social studies for different age groups. To become certified, teachers submit a portfolio with classroom videos and student work samples and complete content assessment exercises within a testing window at computer-based testing centers. Scores are reported back to indicate certification status.