Pavlova, Pepa, Stanislava Konova, Tatyana Borisova, and Mihail Petkov. “Let Me EnterSTEM You!”. Open Schools Journal for Open Science 2, no. 2 (May 20, 2019): 19–24. Accessed June 24, 2025. https://ejournals.epublishing.ekt.gr/index.php/openschoolsjournal/article/view/20253.