This study aimed to determine the instructional competence and leadership of senior high school master teachers and the schools performance in the Division of Laguna.This study used the descriptive methods of research to determine the instructional competence and leadership of senior high school master teachers in the Division of Laguna. The participants consisted of 14 school heads, 50 master teachers and 117 teachers of the senior high schools in the Division of Laguna.The findings of the study showed that senior high school master teachers in the Division of Laguna showed expertise in subject matter, classroom management skills, evaluation skills, teaching strategy skills and mentoring skills. Moreover, the instructional leadership capacity of the master teachers based on curriculum content and pedagogy, and planning, assessing and reporting were found to be good As regard their professional growth and development it was said to be highly proficient. In the area of teaching performance that master teachers are consistent in their participation in seminars/workshops and are outstanding in classroom observation. But in the area of action research they were only assessed as satisfactory. Appropriate recommendations were made to improve the preceding findings especially on the area of doing action research.