This article describes a project called "The art based methods in developing transversal competence" funded by The Finnish National Board of Education. The article is based on the hermeneutic phenomenological approach in action research. The project developed learning environments as well as project-based learning with emphasis on the art-based methods and transversal competence approach to learning. The aim was to develop unique and communal well-being in learning. The project offered tools to strengthen teachers' professional skills to use expressive, art-based methods in different curriculum-based projects. The professional in-service training project included five contact days in six weeks divided into three periods. The expressive art work process followed the model of the expressive art work. The whole process followed the hermeneutical circle as well as the phenomenological method: expressions, reflections and sharing linked all together as a part of authentic learning experience in the context of the Finnish National Core Curriculum (2014). One of the main outcomes was that the use of the art-based methods in transversal competence increases ubiquitous well-being among teachers and pupils. Research material is based on students' diaries, experiences and anonymous feedback.