That's exactly how I use it Davo except that we only have one BTEC unit per Moodle course so it is more manageable. However, it is still difficult to spot a final grade in a unit so your point is a good one.
The point you made in passing about potentially a criterion appearing in more than one assignment is also a good one and might arise in at least two possible situations and I only thought of one originally:
- when a criterion cannot be met in one assignment as I mentioned in my earlier post
- where a student might be given more than one opportunity at a criterion
The second may not normally occur but in the UK I see it in the near future. We are moving towards each student having an individual learning plan which meets their particular needs. This, in theory, would mean that a student could choose between a range of tasks to meet a criterion. Any one of those outcomes met would mean they had also met the criterion.
Hope that made sense my current group is a bit loud!