For a quiz, you can decide how you want to score the multiple attempts (e.g., average, highest, lowest, etc.). But for an assignment, it appears that it is the last score from what I can see. As you describe how your Moodle is coordinated with your SIS, it would appear to me that the data that you desire is somewhere, you just want it in a certain form.
If my observation that the last attempt is what Moodle keeps, previous attempt scores seem a bit irrelevant. I sure you have your rationale why it is useful to know that one student went from a 2 to an 8, whereas another student went from a 5 to an 8 (for example).
If my observation that the last attempt is what Moodle keeps, previous attempt scores seem a bit irrelevant. I sure you have your rationale why it is useful to know that one student went from a 2 to an 8, whereas another student went from a 5 to an 8 (for example).