Instructors can download student assignment submissions to grade them offline
From your Compass course space, go to Grade Center > Full Grade Center.
Scroll to the column that corresponds to the assignment you wish to download submissions from, and click on the downward arrow to access the options menu.
Select Assignment File Download.
If you need to select all students' submissions, check the box at the upper left of the Download Assignment window; if you only need to grade select students' work, check the boxes next to their names.
Click the Submit button. The files will be downloaded into a .ZIP folder, and you will be able to open it on the computer of your choice to grade submissions.