We recommend keeping topics marked as "Current" until the end of the term. This way, you'll receive recommended review reminders at frequent intervals throughout the term, even after your class administers its final exam. This strategy will prove particularly useful if you're expecting a cumulative final exam. When you're ready to change your marked topics from "Current" to "Past," you can do so in bulk by hitting the Account & Settings page and using the Move all Current to Past button.
Similarly, the Manage Marks button on your Study Something Specific page is a quick and easy way to change topics' marks in bulk.