Gilles Aldon

In this page you'll find my main research interest as well as some publications of the last years. I began my career of researcher in 2006 in the National Institute of Education Research (INRP) after having being teacher in high secondary school and teacher trainer in the Research Institute on Mathematics Teaching of Lyon ([IREM de Lyon](http://math.univ-lyon1.fr/irem/)) where I hold the post of vice director from 1995 to 2006. I am now retired after a career as a teacher and researcher in mathematics at the French Institute of Education (Ecole Normale Supérieure de Lyon) where I was head of the [EducTice research team ](http://eductice.ens-lyon.fr/EducTice)until my retirement. My main research topic is the use of technology in the teaching and learning of mathematics. In particular, I am interested in the issues of changes in teaching and learning in the digital age, the contribution of technology in the experimental part of mathematics and in the problem solving processes. In the [DREAM](/dreamaths.univ-lyon1.fr/) team of the IREM of Lyon, I take part in the work on didactic situations of research of problems which are situations (in the sense of Brousseau) where the teacher engages the pupil in a research as independent and as fruitful as possible and where the pupil makes use of his/her knowledge but where very quickly, this strategy proves to be sufficiently ineffective so that the pupil is obliged to make modifications of his system of knowledge to answer the proposed situation. These are also situations where the experimental dimension is strongly present. The research methodology developed by the EducTice team, and used in the DREAM team, is based on design-based research and collaborative research where teachers and researchers are involved in both the research description and the methodology. Research with colleagues leans us to publish a model of collaborative processes between education and research actors for the construction of knowledge (Aldon et al. 2020) and also to refine the model of the Meta Didactical Transposition (Cusi et al., in press) I am also President of the International Commission for the Study and Improvement of Mathematics Education (C) which studies the conditions and possibilities for the development of mathematics education taking into account the experiences of teachers and researchers. The conferences are characterized by exchange and discussion of the research work and its realization in practice and by the dialogue between researchers and educators in all domains of practice.