"There is a fact that rapid changes experienced in the business world make it necessary individuals' having the basic skills as much as special professional skills. This fact was the start point for us to write this project. We knew that these skills allow individuals to be successful in business life, increase efficiency in sector and provide their adaptation more rapidly to the changing world and living conditions.In this context, beside specialized professional skills of individuals, having new essential skills needed for business life, strengthening the relationship between the education system and working life is so important for our country and the development of the European Human Resources.The project ""Cooperative School Networks in Key Skills for a Sustainable and Qualified Career” aimed the establishment of a network of partner schools to help students, educators connect, collaborate, create and share, so to overcome the challenges of business life,provide sustainable qualified career. We intended to develop so called 21st century skills essential for work and life in continuously changing, unpredictable world. We wanted to equip students with very important key skills at increasing employability in national, international working environment. Collaboration was one of the core 21st century skills. And at the end of 2 years project process we can say that the project promoted, encouraged collaboration among students, teachers and became a bridge to the business world as we aimed before. We worked really efficiently and produced perfect results. Our project was based on the principle of ""learning by doing"" with the added value of sharing knowledge and competences with our international partners. The participating institutions were six: Turkey, Germany, Italy, Poland, Lithuania and France ( Reunion Island). All partners had various profiles focusing on technical, artistic or more general subjects but a specific interest in integrating technology in the curriculum, developing the international dimension of education in their institutions and promoting initatives aimed at the development of the 21st century skills of collaboration and creativity. As we planned in application form, We made use of mobile applications on smartphones, web 2.0 resources which offered collaboration tools so that the students could edit documents, presentations or spreadsheets together. In this process,we implemented the Flipped Classroom technique as a basis. All partners worked in teams and contributed to the final products. 3 final products were the great success of our project. The created project products were: ""Bussines Network App (Digital Teacher)"", ""Hybrid Augmented Coursebook with QR Codes"" and a common value ""Euro model ""with led lights to celebrate Europe. The methodology followed was that of project management with the steps of definition of teams, objectives, responsibilities, product and activity breakdown structure, identification of deliverables and scheduling of check dates and criteria. This challenging approach enhanced the quality of student learning, captured students' interest and improved motivation for low-performing ones by offering them a different perspective. Team work helped develop a collaborative culture for teachers and students to the benefit of the whole school community. The experience improved all participants' skills in project design and management by providing them an opportunity of training in this approach. The project produced greater intercultural awareness and appreciation of attitudes and cultures of other European countries , improvement of linguistic, communicative as well as digital skills, a greater understanding of ICT and how to use technology for collaboration."