Manually enter Assignment Grades into Grades

Hi All,

I have a professor that had several students turn in their assignments to him on paper. I did not ask why they did not upload the completed assignment.

My professor would like to know if there is a way to manually enter a grade for a completed assignment. Or import a csv file containing either

1. several completed assignments for a singular student
2. several completed assignments for different students

If anyone has any ideas please let me know.

Thanks