“…For example, by using an app such as matrixcalc.org, calculations are simplified, and times are shortened to decompose a matrix, either diagonally or triangularly, where students can very accurately see the role of the eigenvalue (Wawro, Zandieh, & Watson, 2018). Also, the teacher reveal situations that turn out to be modelled by the matrix; situations that appear in updated literature and use technology (Lay et al, 2015;González-Martin et al, 2021) Based on the consideration of the eight principles of effective programmes, we maintain that the TPD will encourage and make visible to the participants what is understood as a process of documentary genesis, since, from the TPD, they will have a broader range of resources, which they can modify and share with other teachers (Grenier-Boley et al, 2021).…”