The EAMARE-STEAM project aims to investigate the learning and teaching of mathematics. Our objective is to provide teachers and educators with tools that can achieve a more effective mathematics teaching. In particular, the project comprises three sequential phases: (1) characterising the mathematics learning, (2) designing a teaching intervention guide of STEAM (Science, Technology, Engineering, Art and Mathematics) activities based on the results of Phase 1; and (3), implementing and validating this teaching intervention guide.