in·struc·tive 
/ɪnˈstrʌktɪv/ adjective
/ɪnˈstrʌktɪv/ adjective [more instructive; most instructive] : providing knowledge or information : helping to instruct someone
▪ It was very instructive [=informative, educational] to watch the doctors work. ▪ an interesting and instructive lesson
▪ It was very instructive [=informative, educational] to watch the doctors work. ▪ an interesting and instructive lesson
