IPA: /ɪnˈstrʌkʃənl/
KK: /ɪnˈstrʌkʃənl/
Designed to help teach or provide guidance on a subject.
The teacher provided instructional materials to help the students understand the topic better.
Instructional → It is formed from "instruct" (from Latin "instruere", meaning to build up or arrange) and "-ional" (meaning relating to). The word "instructional" refers to something that relates to the act of building up knowledge or skills through teaching.
Think of 'instruct' as building up knowledge, and '-ional' means relating to. So, instructional is something that relates to building up knowledge.