National Board Certification (NBC) is a voluntary yet advanced teaching credential that goes beyond the typical state licensure requirement (NEA, 2015). The purpose of this study is to determine the perspectives of teachers who have completed and achieved NBC, and specifically how it has impacted them as classroom teachers. Using data collected via a survey, this study provides an overview of the perspectives of 496 National Board Certified Teachers centered on the Five Core Propositions of the National Board for Professional Teaching Standards. The findings of this study revealed statistical significance on teachers' reported growth in areas such as leadership, effective instruction, and subject mastery as a result of NBC. Findings also suggest positive change on each of the Five Core Propositions, such as "teachers are committed to students and their learning," as reported by teachers.