Editing Explanatory Feedback (section)

=='''Design Implications'''==

We can often see the role of explanatory feedback in online school exams. For example, in a calculus exam, the grader only pointed out the wrong answer without providing any explanation, which is a form of corrective feedback. This grading method made all students very confused and didn't know how to understand the questions they did wrong, and it also prevented them from learning from their mistakes. After students reported this problem to the grader, in addition to pointing out students' mistakes in the subsequent exams, the grader will also add his comments next to his marks, which is a form of explanatory feedback. After changing his grading strategy, all students who took the exam can self-reflect when faced with their own mistakes and think about the correct problem-solving method according to the grader's explanation. It also greatly improves the effectiveness and efficiency of students' learning. Students no longer need to spend extra time searching for relevant information, and they can also avoid going on the wrong path due to their misunderstanding of concepts.