“…The focus of the professional development of teachers is for them to gain experience on how to teach and how to turn their knowledge into practice for the development of students (Avalos, 2011). Nevertheless, in previous studies, the effect of PBL approach applied in science courses on academic achievement (Aidoo, Boateng, Kissi & Ofori, 2016;Ayaz, 2015;Cayan & Karsli, 2015;Etiubon & Ugwu, 2016;Horak & Galluzzo, 2017) or on conceptual change (Loyens, Jones, Mikkers & Gog, 2015;Oktarisa, Utami & Denny, 2017) are sought, but there were no studies on the scenarios developed by teacher candidates. It is evident that the characteristics of the problem scenarios developed in the implementation of the approach are important (Baysal, 2005;Selcuk & Sahin, 2008), and it is clear that there is a need for studies on the characteristics of the problem scenarios developed by teacher candidates.…”