The purpose of this study was to find efforts to improve teacher performance by knowing the strength of variables thought to be related to teacher performance, namely decision making, organizational integrity, and climate individually or together with teacher performance. The population was taken from private Madrasah Tsanawiyah teachers in Tangerang Regency with a sample of 251 teachers made in proportional random sampling. Besides correlation analysis, Scientific Identification Theory of Operation Research in Education Management (SITOREM) is used to rank the hierarchy of necessity. Research results show that; (1) there is a positive relationship between decision making and teacher performance, with a coefficient correlation of 48.8%, (2) there is a positive relationship between integrity and teacher performance, with a coefficient correlation of 51.9 %, (3) there is a positive relationship between organizational climate with teacher performance with a coefficient correlation of 37.8% and there is a positive relationship of decision making (X1), integrity (X2) and organizational climate (X3) together with teacher performance with a coefficient correlation of 85.3% . Besides other factors are positively related to the increase in teacher performance, which is 27.2%. The results of the qualitative research also show that decision making, organizational integrity, and climate can improve teacher performance.