In Test/Quiz I've found that if my key is wrong after kids start taking a Test/Quiz I can go back in, mark the correct answer, and Schoology will re-grade with the new key, and give the students a correct score.
Today I gave my first Assessment. I was using the drop down box with fill in the blank, and so I used the copy feature when building my questions so I didn't have to retype so many times, but I forgot to revise my key on the copy. After the kids began reporting really low grades, I found my mistake. I corrected the answer, but this time, Schoology did not regrade the work that kids had already submitted. Is there a quick way to do this, without have to go look at every question for every kid? or having the kids redo the Assessment?