How do you get the class' schedule to show in the pop-up message when you hover over the class name in the faculty portal?

In order to see the class' schedule when you hover over the class' name in the All Classes section, the class status has to be set to 'future' or — if the class is set to 'active' — the grading period for which it is scheduled must be set as 'active'.

The schedule is shows when hovering over the Algebra class in the "All Classes" section.

 You can update the active grading period from the Active Grading Period system parameter on the System homepage.