DF's DD (18 yo) has a two-word first name that is a classic name and a color (think "Sarah Teal"). This has clearly been a lifelong issue. She gets upset when teachers do roll call and only use "Sarah." DF has advised her for years to correct them each time, but DD is frustrated that it takes a while to sink in with the teachers. DD is about to apply for college and go out in the world. Thoughts on how to handle this?