While principals may be the key to reform, it is clear, too, that a principal must build a strong leadership team to transform a school. In Dallas, assistant principals are also instructional leaders whose main responsibilities mirror closely those of the principal. Assistant principals are accountable for raising student achievement results, coaching teachers in order to improve the quality of instruction, and building and sustaining a positive and supportive school culture.Because the role of the assistant principal is very similar to that of the principal, the AP evaluation system will be based on many of the same performance and achievement metrics.