Abstract: This research paper deals with results of applying critical thinking program and techniques strategies in developing students' critical and creative thinking. In the reforming its education systems, Kosovo is implementing constructive philosophy and active teaching strategies of this program that creates an appropriate learning environment. Many schools in our country have started and somehow have stabilized in the implementation of this new philosophy and mindset in education which favors the free and creative thinking of students in our schools. On the other hand, many other schools have not begun to reformyet and consequently their pedagogical everyday life is still traditional with elements of formalism and instructional verbalism. In this research we have specifically collected data from the Gjakova Region which is one of the seven regions of Kosovo. These data are the opinions of students and teachers. These opinions, which we present as research findings, are collected from school environments that apply Critical Thinking Teaching techniques, and from school environments that have not begun yet to implement them. The thesis consists of theoretical treatment and comparative analysis of findings from these two school environments which we have elaborated with SPSS software and presented with different tables and graphs. Both theoretical treatment and research findings emphasize the importance of Critical Thinking Philosophy for developing students' Critical Thinking and creative abilities.