Celebración del vigésimo quinto aniversario de Educación Química

Abstract

This editorial work is devoted to talk a little on the 25th anniversary of this Journal. We start with aneulogy of number five, because twenty five is five times five. Immediately we aboard the descriptionof the ten set of authors of the articles on this celebration, all of them about Pedagogical ContentKnowledge or some of their equivalent names (or not, as we shall see). I remember how I met themand also to minimally describe the content of their contribution.