The purposes of this study were 1) To developing of enhancing Instructional leadership Model in Math Teacher Integrated English Language and To Study teachers’ Leadership based on Instructional Leadership Model 2) To study teachers’ English languages proficiency . The sampling were 5 Math teachers who recruited to be participants . they are from 5 province and difference school of North eastern of Thailand . During 6 month in 2014 The instrument for collecting data were Leadership Model , Lesson plan with Content and Language Integration Learning , Questionnaires, Observation form . For statistic used were Mean Percentage . Finding 1) Instructional Leadership Model was LeadingProfessional Internal role Mentor : develops others the professional guidance of staff. Educator: demonstrates technical competence and personal teaching skills. Advisor: supports and counselor And teachers’ Leadership based on Instructional Leadership Model is high level 2) For the English language proficiency, Teacher improve their English language