Starting from the idea that one of the key competencies of the 21st century is mathematical competence, the 5 European schools considered it necessary to brush up on the teaching methods and open doors to educational innovation by taking Math outside the classroom. THE "PLAYFUL MATHEMATICS" project will present a validated model of innovative and creative interventions for the development and improvement of teaching and learning Mathematics. This Erasmus+ project offers a wide range of opportunities for self-development for teachers and students.