Essentially, students would show up to an exam with their grade sheet printed out. That grade sheet (similar to a Scantron sheet) would contain information about the student (i.e. their student ID number) so that when it was scanned in to be graded, it would automatically be linked with the student's class records. That way, a detailed report of the student's performance can easily be built, and the grade sheet can automatically be linked to any other work they've already done.
GradeHub can also send push notifications out to students, so as soon as an assignment is graded, the student can get an update on how they did.
For those higher education institutions interested in learning more, you can contact GradeHub here for more information.