Expanded activities of schools and activities of student cooperatives are important components of the educational process in schools, which are contributing to the improvement of the quality of education and better social inclusion of students. The main objective of this article is to focus on opportunities enabled by the legal framework that supports the realization of expanded activities and activities of student cooperatives in Serbian schools and to compare relevant experiences in Serbia with the practice in neighbouring countries and the old EU Member States. In particular, in this article it is examined to what extent the adoption of entrepreneurial competences through different entrepreneurship development programs contributes to the probability of implementation of additional activities in Serbian schools. For this purpose, the data of the Survey on practising, types and usefulness of expanded activities and activities of student cooperatives are used. This survey was conducted in 2010 at the samples of public primary and secondary schools that executed some sort of additional activities, as well as of schools that did not practice extended activities.