Connecting parents with their kids is def a great feature. You could link them by using a unique identifier for each student, like a student ID or a QR code, and having parents input that ID when they sign up for the app. That way, the app can match the parent with the correct student, and voila! They're linked.
If you're dealing with minors in a school setting, ensure you know the regulations and laws surrounding student data privacy. You would want to avoid running into any legal issues.
Also, if you're working with schools in Oregon, make sure you're up to date on the foster care requirements Oregon. Good luck with your project!