Courseware increasingly consists of generic information and communication tools. These offer a plethora of functionalities, but their usefulness to a particular learning community is not easy to assess. The aim should be to develop comprehensive learning information systems tailored to the specific needs of a community. Design patterns are important instruments for capturing best practice design knowledge. Ontologies, in turn, can help to precisely capture and reason about these patterns. In this paper, we make the case for ontology-guided learning IS design, and sketch the ontological core of a potential design method. Such methods should enable communities to specify and access relevant best design practice patterns. Design knowledge can then be reused across communities, improving the quality of communication support provided, while preventing wheels from being reinvented.