1) Advisory 2) Clarifying 3) Consultative 4) Consultatory 5) Consultive 6) Didactic 7) Didactical 8) Doctrinaire 9) Edifying 10) Educational 11) Educative 12) Elucidative 13) Enlightening 14) Exemplifying 15) Explanatory 16) Expositive 17) Expository 18) Helpful 19) Illuminating 20) Illustrative 21) Informatory 1) Edifying 2) Educational 3) Enlightening 4) Giving information 5) Helpful 6) Instructive 7) Useful 
informative is anything that further educates someone e.x. book, encyclopedia, or in some cases, the internet ...
• (a.) Having power to inform, animate, or vivify.
[Adjective] Something that is full of information or news.
In·form'a·tive adjective Having power to inform, animate, or vivify. Dr. H. More. 
[adj] - providing or conveying information
informatory adjective providing or conveying information
giving information; instructive: an informative book.
tending to increase knowledge or dissipate ignorance