Interoperable interactive geometry for Europe
I forgot my login data

Report a bug

Fan club

Quick Intro Videos
click to start movie
Create A Simple
GeoGebra Resource (25Mb)
click to start movie
Filing a review
click to start movie
Find a Resource

This platform is brought to you by the intergeo project, funded under the eContent Plus programme of the European commission and by partners



Université Montpellier


Montpellier, FR – France



Christian Mercat



Caroline Bardini



Isabelle Gache



Abdeljalil Haraki



Noél Lambert



Antoine Leroux



Jean-Michel Oudom



Arnault Ioualalen (WP3)



Henri Lesourd (WP4)



Benjamin Clerc (Teacher)



Jean-Marc Ravier (Teacher)



Christian Buso (Teacher)



Paul Byache (Teacher)



Patrice Debart (Teacher)



Emmanuel Ostenne (Teacher, Sésamath)



Daniel Mentrard (Teacher)



Sylvain Bourdalé (Teacher, IREM Toulouse)



Collège Belle de Mai (Teacher, Marseille)



Jean-Baptiste Brisson



The University Montpellier II umbrellas three entities: (A) the Institute for Research on Teaching in Mathematics (IREM), Montpellier University branch, (B) Sésamath, an association of French teachers of mathematics, (C) OFSET, an association of volunteers who develop and promote the use of free resources in education.

The IREM in Montpellier is an academic research and training centre in pedagogy applied to mathematics, mixing teachers and researchers, part of a national network. The University Montpellier II hosts this institute, with more than 13 000 students in science.

Dr. Christian Mercat, mathematics researcher in Montpellier University II was educated in the École Normale Supérieure in Paris, PhD in Strasbourg, post-doctoral positions in Sweden, Israel, Australia and Germany. He publishes regularly important papers on discrete geometry. He is the president of the AID association, which develops interactive geometry software called Geoplan/Geospace (GG). In more than fifteen years of existence, GG has gathered tens of thousands of regular users, mainly secondary math teachers in France (more than 3 000 school licences, 700 000 students impacted), and a wealth of educational resources, in several languages, for a wide variety of pedagogical contexts. The French Ministry of Education officially supports GG and its use is part of the curriculum for mathematics teachers training in France. B. Sésamath is a French association that develops and freely distributes educational resources and professional tools used for teaching Mathematics with digital technology, especially through Internet.

It counts more than 50 free software developers, 236 math teachers implied in production projects and 21 500 subscribers to the information letter. Its main software suite, called MathenPoche, is used officially by 4 000 identified teachers and weekly by 200 000 identified students, and more casually by probably 15 000 teachers and 700 000 students (Statistics on the official website It is an on-line modular e-learning tool, with exerciser, course, class and student tracking managers. TracenPoche is its dynamic geometry module, usable as standalone software. Benjamin Clerc is a professor of mathematics in a secondary school, president of Sésamath Association, developer of MathenPoche software, trainer in the IREM Montpellier, person in charge for the national Commission Inter IREM MathenPoche, trainer in mathematics and Communication and Information Technologies for Education, in charge of mission for the Academic Mission Communication and Information Technologies for Education, person in charge for the MathenPoche experimentation in the academy of Montpellier, webmaster of four maths websites. C. OFSET stands for Organization for Free Software in Education and Teaching. It is a French non-profit association which goal is to promote the development of free software for the educational system and teaching. OFSET has founding members all over the world.

GNU Edu ( is a free and open (GPL) online catalogue for educational resources, with searches by country, author, subject, keywords, curriculum and more. GNU Edu metadata are compliant with both Dublin Core and Learning Object Model standards, together with "educational items'' improved granularity for communication between countries and learning contexts. Odile Bénassy ( is a member of OFSET council and develops educational software such as an XML-based exerciser and GNU Edu catalogue.