How about a system where grades are published online. If the parent and student don't acknowledge the grade within 7 days, a reminder text is sent. Then later the actual grade.
A related issue is that many parents struggle with school website logins/passwords. I bet a significant percentage never log in, all year. But they can't ignore their phones.
A related issue is that many parents struggle with school website logins/passwords. I bet a significant percentage never log in, all year. But they can't ignore their phones.