On CodeHS Free and Pro you have the ability to grade a single assignment through the Grade Tab in the Code Editor.
Steps to Grade a Single Assignment:
- Go to the section roster and select which students work you want to grade
- Go to the assignment you want to grade
- Click on the "Grade" tab
- From the Grade tab you can "Award Full Credit", select "Needs Word", give a custom score, add comments or give the student a zero