I have found how to generate a participation report here: http://docs.moodle.org/20/en/Participation_report
However, unlike all other reports, this one does not seem to be downloadable/exportable into a spreadsheet format.
I need to produced these types of reports regularly, and with classes of 80+, copy pasting for each activity is a long endeavour.
Hopefully I'm just overlooking something...
Kristina