I deactivated a class and would now like to make it active again. I can't locate the page anywhere in Power School. I really hope it isn't gone because it had so much information one it.
Are you talking about PowerSchool Learning, Unified Classroom Class Pages or the PowerSchool SIS?
If you click on Inactive, you should see a list of any previous class. The only exception is those you actually DELETED! One deleted they are gone. I have three active and 20 inactive classes. Below is a screenshot. You can select by year or show ALL!
You will probably have to contact your PowerSchool Learning Admin then. I saw that before and thought it was strange. I don't think it's anything a user can do but only admin.