This thesis examines the possible advantages of cooperative techniques in language teaching. Today’s language methodology utilizes more and more of these techniques in order to provide life-like and real opportunity to communicate in classroom situations. This paper discusses the theoretical background as a starter and then I analyse some of my lessons which involved pair and group works. The main focus is on project works. The second half of the thesis details a full-scale project work, which was carried out in Tóth Árpád Gimnázium.