While reading your expose, I wonder if we could use the Q&A forum - with limited access for graders - for this:
- create a Q&A forum and make a group of graders
- give only this group access
- upload the student assignments as questions
- a grader can access a question and add his/her ordeal (as rating?)
- after submitting he/she sees the answers from others and start to discuss with them
What should be changed to the Q&A forum to add the final grade by the head-grader and send the grades to the overview?