You can edit or manually input a grade for assignment or assessment at any time. Here's how:

 

1. Click "Manage" and select "Assessments".

 

 

2. Find the assignment you want to adjust and click the "Submissions" icon to the right, under "Actions".

 

 

3. Find the student and click on the submission in question.

 

 

 

4. Input/change scores in for each question, or for the entire assessment overall, add feedback and click "Post Grade" to finalize.

(You can come back to change it anytime.)