In this paper, we present an analysis of the implementation of measures of attention to diversity for students with special educational support needs studying Compulsory Secondary Education (12–16 years) in the Region of Murcia, Spain. Our aim is to learn about the organisational and curricular structures implemented in five secondary education schools with a total of 1967 students. These structures are used to deal with student diversity through common and specific measures of attention to diversity and are established by law. We intend to verify and assess whether these are properly and effectively implemented, providing a quality educational response in conformity with the discourse on inclusion and social cohesion. A review of existing legislation suggests that it may be advisable to apply common measures before specific ones in the event that a student has educational support needs and, if possible, in the usual context, that is, within the regular classroom.