TESTİNG FREQUENCY AND STUDENT ACHİEVEMENT RELATİONSHİP. Üçüncü Sektör Sosyal Ekonomi Dergisi [Internet]. 2021 Sep. 25 [cited 2026 Jul. 12];56(3):1508-21. Available from: https://tisej.com/index.php/pub/article/view/671