This work, part of the Spanish government's National I + D Plan 2004/07, entitled "Observatics: the implementation of free software in ICT centres in Andalusia: an analysis of its effect on the teaching-learning process", aims to describe the most recent impact of online communication technologies on education in Andalusia (Spain), within a new environment, as are the new ICT schools, characterized by the large-scale implementation of technology in primary and secondary education. By combined qualitative and quantitative methods, the study shows that, due to the presence of ICTs (Information and Communication Technologies) in educational centres, the frequency of computer use in the classroom has increased, along with an expansion of a teacher training process that is progressively oriented towards contextualized models of learning. After investigating the most important factors behind the success of the mass computer installation programmes at the centres, a series of recommendations at centre and governmental level are presented that will ensure the maximizing of the potential of these technological resources.