The Review page

Review collects everything worth another look:

• Daily review quiz: a short mixed quiz of what's most due for you today.
• Wrong questions: everything you've missed. Quiz yourself on them; ones you get right drop off the list.
• Flagged questions: questions you flagged during a quiz or practice test. Due ones go into the daily review quiz first, in order: Read again after 3 days (it clears once you answer correctly), then High / Medium / Low priority, which come back 2 weeks / 1 month / 3 months after you last answered them.
• Flagged segments: reading you flagged, with the same categories. Due ones show up in today's plan and on your study plan's day view.

Lessons also become due for review over time, especially ones you found hard. They're marked Review on the subject page.