You can enter grades from both the assessor tool and the grading tool:
The grading tool allows you to grade the participants.
1. Enter the grade for the student
2. If enabled by the admin, set administrative assessment
3. When you are satisfied with the grade you have set, press "register grade" to make it final. Now the grade cannot be changed unless the admin is involved.
4. "register all" will register all the grades and set them as final.
5. "co-assessors" provides you with a list of your co-assessors.