Considering this problem, a lunar phases teaching sequence has been designed for primary-level pupils, in accordance with current scientic and didactic knowledge, and has been implemented and evaluated under real classroom conditions. The fundamental core of the plan is to enable pupils to relate to observable aspects of the phenomenon, hence the exclusive use of the topocentric system of reference. As part of the proposal, a visual representation has been prepared which explains the lunar phases in a topocentric way, based on the motion of the Moon in the sky. In this way, it is hoped that pupils can improve their understanding of the phenomenon without having to alternate between two points of view: One from outside the Earth, with the Moon moving in space and always half-lit, and one visible from the Earth’s surface, with the Moon moving in the sky and changing its shape from day to day.The learning achieved using this topocentric proposal does not generate difculties or alternative conceptions which may later complicate understanding of a heliocentric approach to the lunar phases.