The native iOS Reminders app is a good app to use for task management; however, the app was not designed to make it easy for users to defer or change dates for incomplete or missed Reminder events.
Fortunately, Workflow can make this easy for Reminders users. In Workflow one can get all of the overdue/missed Reminders use the adjust date action to change the date 1, 2, 3, etc days or hours forward and then create new reminders with all of the data from the overdue/missed reminders. The best part is that all of this is done (including deleting the overdue/missed Reminders) in less than 30 seconds once the Workflow is launched. Additionally, the ability to easily move your reminders based upon time or days will enable you to quickly plan your day and make changes to it as things pop-up to change your plans as frequently happens to all teachers.
Workflow link: Manage missed/overdue Reminders[^1]
[^1]:Created by brentac