I made a social story for one of my students who uses AAC and can navigate/produce language very well but is highly prompt dependent (e.g. will sit in front of a password locked iPad for 10 minutes, waiting for someone to prompt, "do you need something?" before saying "I need help.", etc.). The story covers the basic ways he can initiate, as well as encouragement. Although my student uses AAC, it only mentions use of a device on the cover page. If that word is deleted, it could be used with students who are verbal. This is more of a template (hey- it's free) so you might want to tweak some wording to personalize it for your students.