Understanding spatial proportions is essential for the development of spatial thinking skills in visually impaired students. Immediate experience is essential to perceiving space, especially as regards the estimation of spatial proportions.
For spatial mathematical computations, spatial objects are commonly used in educational practice. The use of models contributes to the understanding of the shapes and parts of an object but contributes very little to the understanding of the proportions, especially when it comes to comparing the proportions of several objects.
The concepts of astronomy are more efficiently internalized by using models, but the interiorized mental models must contain relevant information about the proportions of the celestial bodies. Reporting to everyday objects is often irrelevant in this case because spatial proportions use scales of different sizes.
The project aims to develop the acquisition of concepts specific to astronomy (proportions and distances in the solar system) based on mathematical calculations specific to gymnasium geometry.