"NATURE DETECTIVES" is the fifth International European project, won by "Ivan Vazov" Secondary school, Sopot, as a part of Erasmus + program . Our partners in this project are schools from: Pstragova – Poland; Nové Zámky – Slovak;  Galanesht – Romania;  Budapest – Hungary;  Madrid – Spain;  Sarzana - Italy and Coloura - Greece. The aim of a project is to improve students' interest on the balance in nature and to reduce an adverse effect of its pollution. The focus is on unusual plants and animal species in the geographical areas of the participants in the project and on the impact, which the intruders have on the environment. The project includes not only a wide variety of activities in the eighth countries but also supports the development of scientific activities in extracurricular lessons, language and computer skills of pupils and teachers. The results of a two-year project will be presented and published in different ways: presentations, graphics, exhibitions, websites, media.