The Project "Little Scientist" aims to motivate students for scientific research by working on problems that show the importance of science and particularly in mathematics in real life and are related to other subjects. We are looking for learning arrangements in which students can explore, invent or learn mathematics as active, creative learners with hands-on material (experiments), by using ICT and/or Mathematics software e.g. for simulations. Concrete research experiences will be organized with local research centers. These arrangements – often cross-curricular – will be drafted by teachers but also planned by students (collaborating via TS) , tried out in classes and then evaluated by partner students (and teachers). We mainly address to students at the age of 14 to 17. Each meeting has a real life topic e.g. architecture, games of chance, flowers, water ... We will take 5-6 students of each country to each of the five planned meetings. They will work in international teams related to the topic prepared before. They will compete in order to resolve the more efficiently the problematic. Finally, they will participate in “super-lessons” planned by Comenius teachers. Students will attend normal math lessons in the hosting school as well. In between the meetings international teams of students work on motivating activities that they, later may also "teach" or try out in their own or younger classes. The innovation of this project is that it will involve a local research center each time closed to the visited school, where a concrete scientific experience will be organize by a Scientist and the teacher. This will put the students in a real research situation where the communication and organization between them will be the key of success. All students' activities will improve their language skills since we will focus on CLIL methodology, as well as key competences. Teachers will benefit of the project, too by exchanging teaching methods that are highly cooperative, offering students own ways of learning. That broadens teachers' practice and raises the effectiveness of teaching. All participants will get to know a lot about different European cultures.