In the words of Alexandre Galí, secondary education "deals with the immense task of starting to learn how to make good use of the elements prepared in childhood by means of a carefully constructed plan". These previously acquired personal and intellectual tools must now be used by the children in an independent and responsible manner to learn about the world and live in it capably.

Adolescence is a time of crisis, and therefore growth, an opportunity to harness all the energy of these boys and girls and channel it properly for the benefit of their personal and academic development. To do this, Escola Sant Gregori combines a high level of academic standards with firm but flexible rules that allow us to create good working and social environments, along with educational guidance that brings out the best in every student. The secondary school fosters the awakening of intelligence, the discovery of one's vocation and the cultivation of a critical and reflective point of view.

By devoting a greater number of teaching hours than that required by law in the most important subjects (English, math, history, physics and chemistry), we aim to provide a more comprehensive and profound education, rich in content and using good intellectual work habits, so that this knowledge is retained for life. In the upper years, the First Certificate and DELF (diploma in French studies) are obtained, while preparation for the Advanced Certificate is begun, all within school hours.