No, not in a short answer. You could regrade an essay. Sounds as if your are grading each answer anyway. If you used a quiz instead of a lesson, you could regrade individual answers given by each student.
Hope this helps Chris
Lesson
grade override
Энэ мэтгэлцээн түгжигдсэн тул та цаашид хариулт өгөх боломжгүй