School directors participate in the individual evaluation of teachers at schools as part of the programme of Carrera Magisterial. However, because those who participate in this process (as well as in the Escalafdn evaluation) belong to the union, the process is not necessarily very objective. The Schools of Quality Programme (Programa Escuelas de Calidad, PEC), introduced in 2001, is one of the initiatives that has most emphasised the development of school-centred leadership in Mexico (see Box 2.2 in Chapter 2).