Recently I've seen an interactivity type that would be really useful for obtaining a self-marked score from a free text answer question.  It starts off like a Model Answer question, with a prompt and a free text box.  When the answer is submitted, the feedback is shown - but the feedback is organised like a mark scheme where individual items can be ticked off by the student if they had included it in their own answer.  The student then submits again, resulting in a numeric score for the question (that could also be tracked).  Example (shows view after initial submission of free text answer):
This would be a great interactivity type to have in Xerte, if it is not already achievable by some customisation?  Thanks.