Yavuz, Emine, and Hakan Yavuz Atar. “Examining the Effects of Students and School Variables on PISA 2012 Problem-Solving Achievement in Turkey”. New Trends and Issues Proceedings on Humanities and Social Sciences 2, no. 5 (January 12, 2017). Accessed November 22, 2024. https://un-pub.eu/ojs/index.php/pntsbs/article/view/1124.