1.
Bal AP. The effect of constructivist learning environment on the academic achievement and van Hiele Geometry Thinking Level of elementary school teaching department students in basic mathematics course. PEGEGOG [Internet]. 2011 Sep. 1 [cited 2025 Aug. 1];1(3):47-5. Available from: https://pegegog.net/index.php/pegegog/article/view/C1S3M7