International audienceToday, many teachers have, on one hand, the opportunity to benefit from powerful geomedia technologies to improve their lessons, but on the other hand they have to deal with problems and difficulties handling and making sense of them. Nevertheless, remaining in ignorance is not a realistic option at all as today geomedia technologies pervade everyday life. This introductory chapter to a book dedicated to the use of geomedia in secondary education presents the Challenges and opportunities emerging with the societal impact of geomedia need to be addressed through educatio