Tartu International School is an elementary school that offers English-language education to students living in or near Tartu. The school educates students in grades 1-9 from countries all over the world. Tartu International Schools values cooperation and sustainable development, and seeks to support the growth of globally-minded citizens. The school´s curriculum is based on the Estonian national curriculum for elementary schools, and meets the needs of the school´s diverse student body.Tartu International School is a learning organisation that wishes to develop its teachers´ professional capacity in order to raise the quality of education. Multicultural and multilingual environment of the school offers various possibilities and challenges. The main objectives of Tartu International School for years 2016 - 2019 are to develop Content-Language Integrated Learning methodology, find possibilities for broad cooperation and implement education for peace principles in teaching.Six staff members will take part in the mobility project, and three mobilities in Europe will take place during this project. Two members of the school management will participate in the educational leadership conference in Maastricht, which is organised by the European School Heads Association (ESHA). The main topics of the conference are innovation, inspiration, cooperation and safetety in 21st century schools. The second mobility involves two language and subject teachers of the school, who are going to take part in a Content-Language Intergrated Learning methodology course in Malta. The course is organised by a leading teacher in-service training organisation in Malta. Modern schools need to prepare their students to situations and teach how to run and maintain dialogue even in complex circumstances. Therefore the third mobility of the project provides the co-ordinator of the student council and the citizenship teacher with a possibility to attend a course about implementing principles of peace education at school. The course takes place in Croatia and is led by an organisation called Forum for Freedom in Education, Croatia.The mobility project raises the professional capacity, motivation and competitiveness of its participants. As a result of the project the curriculum of Tartu International School will be developed, through the raise of teachers´ competences the students´ academic and social development is positively influenced. The staff members of Tartu International School will gain knowledge and experience about the good educational practices in other countries, and are able to share their own work-related successes. The project helps to develop Tartu International School as a competence centre.The results of the project are disseminated through internal courses and external seminars organised and led by Tartu International School. The results of the project are published through the school´s website and social media.