This study analyzes the effect of Transformational Leadership, Organizational Climate and Work Motivation in Boosting Teachers' Performance when tested both individually and simultaneously. Transformational Leadership, Organizational Climate and Work Motivation are treated as independent variables that boost the level of Teachers' Performance as a dependent variable. The research was conducted on proportional randomly selected 316 public junior high school teachers in Bekasi, Indonesia. Using mix method, a sequential explanatory design is applied where quantitative come first. The study both quantitatively and qualitatively reveals that there is a positive significant relationship among variables under the following distribution of coefficient of correlation: Transformational Leadership to Teachers' Performance = 0.3994, Organizational Climate to Teachers' Performance = 0.5599, Work Motivation to Teachers' Performance = 0.7161, and when tested together it produces coefficient of determination = 0.759 indicating the existence of other 24.1 % variables not including in the model affecting Teachers' Performance