Abstract: “The present questionnaire-based study examines the outcomes of project-based learning procedures in Greek University postgraduate classes, where the project entitled “Eratosthenes’ Sieve” takes place. Master in Education students at Harokopio University provided relevant information by answering a set of close-ended questions specifically designed for the research. Data elaboration and statistical analysis were performed. The results of the study showed that, according to MEd students, the teachers’ role during the carrying-out of the project remains crucial, since s/he establishes the rules of communication, defines the objectives, simplifies the learning material and intervenes in a supportive way to strengthen students’ cognitive background and self-confidence, to overcome setbacks and facilitate constructive cooperation. The research also showed that as long as projects’ implementation during postgraduate studies are well-designed, attractive and demanding regarding high-ranked cog”

Keywords: project-based learning, post-graduate studies, ‘Eratosthenes’ Sieve’, Greece