in ‧ struc ‧ tion ‧ al /ɪnˈstrʌkʃ ə nəl/ BrE AmE adjective formal
[ Word Family: noun : ↑ instruction , ↑ instructor ; adjective : ↑ instructive , ↑ instructional ; verb : ↑ instruct ; adverb : instructively]
providing instruction ⇨ educational
instructional programmes/materials/techniques etc
a free instructional video.