We've gotten feedback that freezing the personal deck is confusing, so we've updated the flow.

When you freeze a class' personal deck in the Settings page, the Class page now has a badge that indicates that the personal decks are frozen, and the Personal Deck Cards Due column will show as N/A.

In the Personal Deck tab of the class, the data over time view will show that 0 questions are due for the dates you have personal deck frozen.

Lastly, in the Settings page, there is now a progress bar when you unfreeze the personal deck.