When a Maths or Thinking question is answered incorrectly, that exact question is put aside and served again later. When it returns it carries a Comeback chip in the question header. Answer it correctly and it is cleared for good. Miss it again and it is pushed further out before it returns.
There is no comebacks list
This is the part families most often look for and cannot find. Comebacks are not a page, a tab or a section. They are woven into ordinary practice: as a student works through a subject, a due comeback takes the place of a new question every so often. Refreshing the page will not produce one, and there is nothing to open.
How to see one
A small dot on a skill tile means a comeback is waiting somewhere in that subject. Keep practising Maths or Thinking and the due ones will appear. The home screen's Practise now card also points at comebacks when several are due.
Which subjects schedule them
Maths and Thinking only. Reading and Writing never schedule comebacks, so a student working only in those subjects will never see one.
Why they are spaced out
A question answered wrongly and re-answered a minute later proves very little. Leaving a gap before it returns is what turns a corrected mistake into something remembered, which is why a comeback appears weeks after the mistake rather than the same day.
If the stream changes
Comebacks belong to the content stream the student was on. Moving between the OC and Selective streams retires the old ones instead of carrying them across.