It can be seen that a considerable proportion of participants show signicant modifications in their explanatory models, even more, if we take into account that at the beginning of the sequence no pupil from the class was able to satisfactorily describe or explain the lunar phases. However, 46.2% of the children were still not able to explain adequately the phenomenon at the end of the topocentric teaching sequence, which indicates the need for future analysis of the reasons for these difculties in comprehension.