1) Literary concept 
Didacticism is a philosophy that emphasizes instructional and informative qualities in literature and other types of art. The term has its origin in the Ancient Greek word διδακτικός (didaktikos), `related to education and teaching`, and signified learning in a fascinating and intriguing manner. Didactic art was meant both to entertain.....
• (n.) The didactic method or system.
Di·dac'ti·cism noun The didactic method or system. 
noun communication that is suitable for or intended to be instructive; `the didacticism expected in books for the young`; `the didacticism of the 19th century gave birth to many great museums`