App for a teacher to assign tasks to students and allow them to communicate. Plus communication with teachers and principals

This would essentially be an email app but without the email addresses. You know how every apple device comes with iMessage? It would be like that but if you used it during school hours you would also be able to write to teachers and principals that have downloaded the app.<br>Maybe you could also make an app like discord but teachers would be able to make classrooms with channels to communicate with the class.<br><br>Some of the features it would need:<br>- Assignments and due dates<br>- Reminders<br>- Quiz results<br>- Allowing teachers to send out mass emails<br>- Message requests to teachers if the student has a problem<br>- App integration with Google drive, Dropbox, or other cloud drives.<br><br>The email feature would not be available outside of school hours.