Harbor High School also uses the Challenge Day experience to bring students closer together. 

This event is a workshop that provides training for students in areas of diversity, acceptance, listening, communicating, empathizing, and emphasizes taking a leadership role at school and in one's own life. Harbor students also receive instruction in Character Education throughout the school year to strengthen core leadership skills. Character Education assists students with thinking about the role choices play in their lives and their relationships. The curriculum is called Character Under Construction, and deals with topics that teenagers regularly encounter such as breaking trust, assuming responsibility, measuring success, and maintaining friendships.