This paper aims to show best practices of GBL design for engagement. It intends to show how teachers can implement GBL in a collaborative, comprehensive and systematic way, in the classrooms, and probably outside the classrooms, based on empirical evidence and theoretical framework designed accordingly. This paper presents the components needed to design an innovative GBL platform, and it describes how to facilitate learning in a gaming environment, sustain continuous learning in the gameplay, and apply the successful methodologies. In this paper, the authors discuss the overall findings of pupils and teacher surveys and classroom observations in the context of primary education (pupils ages between eight and twelve). The findings helped with guidelines design instructions of GBL for engagement and learning. By using a game-based approach best practice, teachers can embed gaming and learning principles to create engaging learning experiences.