THE EFFECT OF THE THIELEN MODEL (GROUP INVESTIGATION) USING SKILLFULL EXERCISES IN LEARNING SOME BADMINTON SKILLS FOR STUDENTS. PJSSPE [Internet]. 2025 Mar. 15 [cited 2026 Sep. 19];2(03):93-100. Available from: http://proximusjournal.com/index.php/PJSSPE/article/view/215