“…Such skills favor awareness of the teacher's own cognitive processes, reflection in and about action, and understanding of the causes of the difficulties in teaching behavior and of the obstacles to educational change. They hence make self-regulation and control of the process of change possible (Baird, Fensham, Gunstone, & White, 1991;Copello & Sanmartí, 2001;Gunstone & Northfield, 1994;Gunstone et al, 1993;Lucio, 2001;Sanmartí & Jorba, 1995). Professional development has to go together with personal and social development (Bell & Gilbert, 1994), taking affective aspects into account, reinforcing the teacher's self-esteem, encouraging constructive collaboration, strengthening the culture of the corresponding school, and building on the good practice that the teachers are already carrying out (Hargreaves, 1996).…”