In Moodle 2.4 when you grade offline using something else like a spreadsheet, the moodle way to upload grades is to first download a CSV worksheet that has enrolled course members listed as "Participant" + a unique number.
The difficulty with this is that the scheme changes the unique Participant number from assignment to assignment.
Is there another way to successfully upload assignment scores that instead uses a different field than the "Participant" + a unique number, such as the username that is drawn from the list of enrolled students?
I have tried doing it this way and it always fails uploading.
Can anyone point me to an answer?