GIS learning in Europe is lagging behind compared to the use of GIS applications in everyday life, like car navigation systems, interactive maps on the Internet, etc. Progress could be made by initiating continent-wide educational programs. The EU-funded projects iGuess and IGuess2 aim at developing a teacher training course to promote GIS and instruct teachers in using it. In this project, international courses and course material are developed. In these courses, attention is paid to methodologies, guidelines, good practices and exercises for using GIS in classroom practice.