A lot of pedagogical resources are available thorough the Web. Paradoxically, this plethora of resources makes it hard for instructional designers to discover and decide which ones will best fulfill their needs while building particular teaching setups. In different application domains and web 2.0 solutions, end-users' experience has been identified as a major source of information that can help others in such resource selection process. However, if these solutions are interesting, none of them totally fulfill the needs and end-users' experience can hardly be browsed while being dispersed over the web. In this paper we present our research prototype called EVOXEL and show how it can help instructional designers by completing widely used web solutions. Strongly inspired by results coming from social and human sciences, and built upon ontological mechanisms, EVOXEL is designed to let teachers share the experience they have developed during their own instructional activities, experience that has crystallized in the educational resources assemblages they have built while performing their tasks. This experience can then be browsed, inviting others to be inspired from it while discovering resources described in concrete contexts of use and from their own user's point of view.