The research presented in this paper is part of a project to design a learning environment for mathematics in secondary schools (11–15 years old). We consider three issues in this work: the consideration of the learner in the environment, the description and production of exercises in the platform, and finally the linking of these two elements through learning paths adaptable to the learner. For the consideration of the learner, we have introduced the notion of personal logos. The resources are described and produced using a knowledge model. Finally, the learning paths are structured in relation to the praxeological needs of the students, without however aiming to satisfy them completely in the environment.