Synonyms for Instructive:

adj.

all (adjective)
informative.
educational (adjective)
educative, Illuminative, informative, didactic, enlightening.
informative (adjective)
educational, revelatory, enlightening, explanatory, instructional, educative.

n.

instructional, teach, edifying, Illuminative. informative (noun)
revelatory, up-to-date, meaty, up-to-the-minute.
instructive (noun)
didactical, explanatory, doctrinaire, interpretative, expository, informative, clarifying, elucidative, expositive, educative, ostensive, didactic, interpretive, demonstrative, enlightening, educational, illustrative.

Other synonyms:

instructional, Illuminative. edifying. informative
revelatory, up-to-date, meaty, up-to-the-minute.
Other relevant words:
instructional, Illuminative, up-to-date, edifying, revelatory.

Usage examples for instructive

  1. Your conversation, and especially your correspondence, were at once highly entertaining and instructive – Robert Burns by Principal Shairp
  2. The difference between B and D is instructive and the idea is useful in all such cases where it is a condition that the pieces must be different in shape. – Amusements in Mathematics by Henry Ernest Dudeney
  3. This visit to Europe proved most instructive – Autobiography of Andrew Carnegie by Andrew Carnegie