Geometry in the early years: a commentary

The primary goal of this paper is to provide a commentary on the teaching and learning of geometry in the early years of schooling with the set of papers in this issue as a guiding factor. It is structured around issues about geometry education of young learners, such as: what should we teach in geometry and why; representation of geometrical ideas; the teaching and learning of geometry; and assessment of children's learning in geometry. The author outlines his views based on the literature and the papers in this issue and concludes with an outlook on the future teaching and learning of geometry in schools.