Problem Statement: Although students’ problem solving skills which acquired at the end of the problem-based learning (PBL) process have been displayed by various studies, there has been no research about which of the problems prepared based on a certain course’s objectives/content have been discerned by the students. This study aims to be first on this issue. Focus of Study: The purpose of this research is to determine the levels of students’ skills in the phase of “problem discerning” which is in the first step of PBL process. For this reason, this study was focused to answer the question “What are the levels of students’ skills in discerning ill-structured problems in scenairos prepared in accordance with PBL approach and the objectives of classroom management?”. Method: This study is a qualitative one. Its population consists of 48 students who enrolled classroom management course during the 2004-2005 academic year’s spring semester, in the Department of Primary School Teaching at Hacettepe University. In order to determine the levels of students’ skills, “portfolio assessment” technique was used and content analysis was carried out for data obtained. Findings/Results: At the end of the research, it was found that the highest scoring group was able to discern only half of the problems and the other groups less half of them and also that there were some problems discerned by none of the groups. Recommendations: It recommended that problems which were not discerned by none of groups or only by very few groups should be reflected in a different ways to scenarios.