Work you have already finished, marked the same night while it is still fresh.
Marking a class set takes time. Work handed in Tuesday might come back Friday. Nobody’s fault.
But by then you have done three more the same way.
Upload what you have already finished. I mark every answer and tell you which are wrong and why. You fix them before you hand it in.
A mistake caught tonight costs a minute. Found in June it costs an evening, because by then it is a habit.
What I find goes into your profile too. Work you did entirely alone still shapes what comes next.