Progress is saved as you go, on the server. Closing the tab, losing the connection or switching to another device does not cost the work: open the task again and it resumes where it stopped, on the same item. Only whatever had not yet been sent at the moment of the break can be lost, which is usually the last answer.

Answers are final. Progress only moves forward — an answer cannot be corrected, and a stage cannot be replayed to improve it.

There is no restart button, and it is not missing by accident. A task that has been finished cannot be taken again by the student. The only way to repeat it is for the teacher to assign the same task once more, which is allowed as soon as the first run is finished or has run out of time.

If the deadline passes while the student is inside the task, they can carry on to the end and everything answered is kept. If they had not started it, they can no longer start.

A student sees their own answers and where the mistakes were, but no mark and no score: the summary figures and the comparison across students belong to the teacher’s screens.