Book excerpt: The purpose of this study was to examine the impact of principal leadership styles on teacher morale. Two high schools in Pennsylvania participated in the study. A researcher-designed online survey with Likert-style rating scale, and open-ended questions were utilized to collect information. In addition, ten individual interviews were used to triangulate the data. The results of the study indicated that there was a relationship between certain principal practices and their ability to positively impact teacher morale. Participants reported the most influential principals were excellent communicators, trustworthy, knowledgeable in education matters, led by example, inspired their faculty and were highly visible throughout the day. These results imply that a principal's daily leadership practices play a vital role in positively impacting teacher morale at the high school level.