How to find the lower altitude of a region using a pair of aerial photography?

Resumen

Nowadays, students live in a world full of images and feel the lack of practical and playful educational activities at school. Most school curricula do not provide teaching methods that allow students to understand images and reflect on their im-portance. This article aims to show that a question formulated by a student during a practical activity can act as a trigger to an important process of knowledge construction, the basis of which was a previous analytical study of the environment.