When students submit an answer, they are told whether it was right or wrong straight away. They are also shown all possible correct answers to a question. We think it's really important that students get that feedback immediately, so misunderstandings don't stay in their minds any longer than they have to. In paper-based homework, the misconception stays in the student's mind until they get their book marked by a teacher. If they have a question about one of the answers, they can submit it right away by clicking “Disagree with mark”, rather than forgetting about it before the next class.
In the example below the student has given the correct answer on the last question of a test, although though they've spelled it wrong. Educake accepts spelling mistakes of up to two characters wrong.