Problem-based learning (PBL), also known as problem-oriented learning (POL), is a form of learning whose characteristic is that learners are to find a solution to a given problem largely independently. This form of learning has mainly been described for individual university studies, but we also consider it useful for vocational training at upstream EQF levels. Problem-based learning should promote the acquisition of knowledge that can be used flexibly, the development of cross-curricular competences and better problem-solving skills. Social competence and the ability to work in a team are key qualifications that can be acquired within the framework of this training. PBL cannot replace traditional teaching and learning methods, but it can supplement them. During the project the main goal is to involve all the partners, from Portugal, Italy, Croatia in Germany to work collaboratively around PBL