Background Three partners of the project were in different situations before the project. Pärnu Sytevaka Humanitarian Gymnasium has been involved in some previous projects about environment and nature protection and just started entrepreneurship courses in school curricula. Students were very interested in the new course and the school joined the Junior Achievement program to create and run student companies to learn practical business during the entrepreneurship course. Gimnazija Novo mesto had been carrying out entrepreneurship as an extracurricular activity for 10 years and as part of an interdisciplinary thematic subject for 2 years. Colaiste Chraobh Abhann was a school of economics that taught economic subjects. Goals With the project To Train Your Own Sustainapreneur, we wanted to achieve new knowledge, skills, and attitudes in the field of entrepreneurship, solving challenges, and dealing with current problems in all project participants, especially in the field of sustainability. In addition, we wanted the participants to get to know their peers from other backgrounds and cultures more closely, as this would contribute to strengthening cultural awareness and expression. Therefore, we primarily wanted to achieve an improvement in entrepreneurial competence. Additionally, we wanted to improve personal, social, and learning competence, civic competence, multilingualism, and digital competence. We also wanted the participants to deepen and strengthen their awareness of the necessity of sustainable development. We also wanted the teachers/mentors to further deepen and expand the teaching methods, especially in the field of entrepreneurship education, and to acquire knowledge about the various techniques used for this purpose, such as the design approach, agile development, the use of the business model framework, etc. The students should deepen their knowledge of methods and strategies of creative thinking and learning. Preparing a portfolio of the best innovative examples of teaching practice, to which we will find out during the project's duration, as well as the best examples of student work. We also wanted to collect precise descriptions of the goals of our work, the methods we used, the obstacles that arose and how we solved them, and of course the final results. We expected each participant to be able to identify problems, needs or opportunities in their immediate or wider environment, especially in relation to sustainable development. We also expected the students to acquire the necessary skills to choose a suitable team and find solutions that have value for users and sustainable value. We expected that the students would acquire enough knowledge to be able to spread and share the knowledge gained within the project. We wanted participating schools as well as local, national and European communities to be able to use the results of our work for their further work. The participants in the project would thus be able to spread the acquired knowledge, skills, and competences among other people; peers, and colleagues, as we expected. This would have positive far-reaching consequences for teaching entrepreneurship and would help to develop sustainable solutions that would have a wide reach.