Open Tabs for Unpublished Modules

[JennLong]

If a student has a tab open for an assignment or quiz, and I then unpublish that assignment, quiz, or entire module, the student is still able to access their assignment or quiz and even submit it. I do not want students to be able to access anything once I unpublish a module. The whole point is for them to only be able to work during work hours. How do we circumvent this so students are not able to continue working outside of work hours?