I do not disagree that didactic is to do with teaching, but I sense that it is to do with a particular form of teaching. Didactic teaching is to do with 'declaration of truths' rather than exploring the ambiguities associated with a topic. Therefore didactic teaching is more appropriate for pure subjects (for example mathematics and physics) where the inherent systems are known and defined but less suitable (and deprecated) in such areas as management.
In this article it's used as a noun. http://www.ibe.unesco.org/publications/ThinkersPdf/comeniuse.PDF