In the old schoology, you could correct/or add an alternate answer to fill-in the blank after it was created. Any quiz already submitted would be automatically updated and re-graded to reflect the new possible answer. In the new schoology, it does not re-grade. You have to go into each student and override each answer...this takes too long! Please add the old feature of re-grading to the new one!!
Grading a Fill-in the Blank Quiz