Against the backdrop of PISA 2015 results, the aim of this study is to review basic structures of German education system by exploring curriculum development process, key features of each educational level and teacher education in order to grasp how Germany has amended her poor performance after PISA 2000 and persistently improved the quality of education. It was contended that the German education system has provided school-based support, monitored and targeted the most disadvantaged students schools instead of penalizing schools for poor performance and publicizing school-level test scores. Germany's PISA results in retrospect also show that she has improved her scores in all domains since 2000. Germany is aware of the fact that the key to economic development and prosperous life is strictly related to the quality of education, and it is decisive about making it accessible for all diverse groups within the country.