On the course home page click to enter the VoiceThread assignment.
The the roster of students displays on the right side of the screen and is sorted into two groups: Submitted and Not Submitted.
Select a student in the Submitted section to review that student's comments.
Click in the Grade box to add a grade up to 100 percent.
This grade will recalculate according to the points you have applied in the External Tool Grade section. For instance, if the External Tool Grade is set to 10 points possible, the grade of 95 submitted in the VoiceThread view will be recalculated to 9.5 points in the course gradebook.