instructive
Word family (noun) instruction instructor (adjective) instructive instructional (verb) instruct (adverb) instructively
From Longman Dictionary of Contemporary Englishinstructivein‧struc‧tive /ɪnˈstrʌktɪv/ AWL adjective INFORMATIONproviding a lot of useful information SYN informative Thank you, that was very instructive. an instructive comparisonExamples from the Corpusinstructive• Lectures must be interesting as well as instructive.• The books are designed to be both entertaining and instructive.• The book is filled with instructive drawings.