intended for instruction; instructive

didactic poetry.

inclined to teach or lecture others too much

a boring, didactic speaker.

teaching or intending to teach a moral lesson.

didactics, ( used with a singular verb ) the art or science of teaching.

adjective

academic , advisory , donnish , edifying , enlightening , exhortative , expository , homiletic , hortative , instructive , moral , moralizing , pedagogic , pedantic , preachy , preceptive , schoolmasterist , sermonic , sermonizing , teacherish , teacherly , teachy , didactical , educational , moralistic , tutorial