This study aims to reveal and analyze the sequential explanatory teacher performance concerning transformational leadership, job involvement, and interpersonal communication. This research is done by survey method with the target population is all of the Foundation's permanent teachers as many as 113 people selected in proportional random sampling spreading out in 10 High Schools in Bogor City, West Java, Indonesia. The hypothesis test was conducted at the level of significance 0.05. Using Sequential Explanatory Mixed Methods, this research concludes that there is a very significant positive relationship reinforced by quantitative research results that transformational leadership affects teacher performance with correlation coefficient= 0.801 and coefficient of determination = 0.791. Also job involvement affects teacher performance with correlation coefficient = 0.706 and coefficient of determination= 0.684 c and interpersonal communication affects teacher performance with coefficient = 0.755 coefficient of determination ry32 = 0.697. Finally, together transformational leadership, job engagement and interpersonal communication affect teacher performance with correlation coefficient = 0.706 and coefficient of determination = 0.598.