Application Of Problem-Based Learning To Teaching The Relationships Within A Triangle And Solution Of Triangles

Problem-based learning (PBL) is an active, student-centered teaching approach that has been interested in many educational institutions worldwide. The effectiveness of applying PBL in teaching subjects in general and Mathematics, in particular, has been clarified by many researchers. In particular, many studies have shown that PBL positively impacts students' practical problem-solving skills and improves students' learning attitudes in mathematics. This study was conducted for eighty-one 10th grade students to test the effectiveness and feasibility of PBL in teaching the relationships within a triangle and the solution of triangles. Students in the experimental class were taught according to a 6-step learning model based on PBL, while students in the control class were guided by the conventional method. Research results show that students in the experimental class achieved higher results than students in the control classabout mathematical knowledge and skills in applying knowledge to solve real-world problems related to the interactions within a triangle. Besides, the high level of positivity when participating in group activities, active learning attitude and the desire to continue to experience the PBL learning environment of the students in the experimental class have contributed to confirming the effectiveness of this teaching approach