didactic

adj. instructive, educational, informative; tending to lecture others excessively

Didacticism is an artistic philosophy that emphasizes instructional and informative qualities in literature and other types of art. Didactic art should not primarily "entertain" or pursue the subjective goals of the artist.An example may be found in Alexander Pope's An Essay on Criticism, which offers a range of criticism and advice.The term "didactic" also refers to texts (and by extension, media, such as film or television) that are overburdened with instructive, factual, and/or otherwise "educational" information, sometimes to the detriment of a reader's (or viewer's) enjoyment. The opposite of "didactic" is "non-didactic." If a writer is more concerned with artistic qualities and techniques than with conveying a message, then that piece of work is considered to be non-didactic, even if it is instructive/educational.
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Adjective
1. instructive (especially excessively)
(synonym) didactical
(similar) instructive, informative

(n.)
A treatise on teaching or education.
  

(a.)
Alt. of Didactical
  

didacticcorp didactic = teaching staff
corp didactic univ. = professorate
gen didactic = didactic style.
poemă didactică = didactic poem