If your school uses our grade export system, then you know how easy it is to submit grades. The most important thing to remember when submitting grades is to never uncheck a student unless you don’t want them to receive a grade.
Even if you have already submitted grades and just need to go back and change one student’s grade and resubmit, leave all of your students checked.
You can resubmit grades as many times as you want as long as the grading window is open, but remember to always submit for all students because each grade submission replaces the previous submission.