In the field of higher education, critical thinking skills play an indispensable role in improving the quality of training at universities. To develop this skill for students, applying appropriate teaching methods for each module is very crucial. The Probability module not only helps students improve their mathematical abilities but also encourages the development of creative and critical thinking. In this article, a 6-step probability problem solving model is built, along with the application of diverse teaching methods such as groupdiscussions, exercises, analysis of real-life situations and  the use of various learning materials. These methods are considered effective in training students' critical thinking skills.