coMentor is a JTAP supported project to develop a multi-user learning environment for social science students which is accessible over the World Wide Web without the need for any special client-side software. The system provides a collaborative virtual environment in which students can take part in synchronous and asynchronous discussion on theoretical issues related to the social sciences and humanities, along with a set of learning tools to support debate and collaborative work. The first part of this paper will describe the system and the user-centred design and evaluation process behind its development. The second part will discuss the use of the system to support a Master's philosophy option and a compulsory second year undergraduate philosophy course at Huddersfield University.