This article provides a summary of the most notable results of a research project with the aim of analysing the process of educational integration of information and communication technologies (ICT) in teaching and learning practices of four primary and secondary schools in the Canary Islands. The research team has planned and developed ethnographic methodologies in which a longitudinal study has been performed, over two years, with participating schools in the Medusa Project (a government educational project to provide digital technology to all schools, and to train teachers for ICT educational use, in the Canary Islands). We selected four schools (three of Early Childhood and Elementary Education and one of Secondary Education). Data collection was conducted through different qualitative techniques: interviews (with the management team, the ICT coordinator of the centre and the teaching staff), via classroom observations, and by conducting focus groups with students. The research team has tried to identify the most important effects of the Medusa Project, and specially, of ICT regarding innovation in school organisation, in the classroom teaching, in the student learning environment and in the professional practice of teachers. The results are broadly similar to studies conducted in other international contests. The findings indicate that ICT incorporated sonic organisational changes both at centre and classroom level, but not necessarily pedagogical innovation in teaching practices. Also, the figure of the ICT teacher and coordinator is an important catalyst in the process of using digital technologies in a pedagogical manner in every school.