The purpose of this study is to describe and analyse the functions, tasks and actions of support teachers in inclusive classrooms in an ordinary school, moving from a therapeutic, integrative model to an inclusive one. Qualitative research in a longitudinal case study is presented, following two children with functional diversity over four years along three axes: the concept of inclusive education, the determination of good practices for inclusion and the role of the support teacher. The results allow us to propose different inclusive practices for support teachers, and a significant increase in the presence, participation and progress of these children in ordinary classrooms. We conclude that a conceptual change in the teaching approach of teachers can lead to the implementation of alternative teaching methods, requiring involvement of support teachers for adequate inclusion, through greater presence and participation in the ordinary educational activities of students with functional diversity, favouring their social, emotional and academic development and learning.