This article explains what you see when you look at a student's graded matching question.
When you go to Grade Assignments in your course that includes an assignment with a Matching question, there are three possible outcomes.
1) The student answers all the matched pairs correctly
In this case you will see all correct answers in green and the student will earn the total possible points. See example below:
Note: The question above is worth 11 points and the student earned all 11 points.
2) The student missed some of the matches
If the student misses some of the matches, then the incorrect responses will be in red at the top and ALL of the correct answers will be listed below that. This is done so that the student can see what he/she should have chosen. See the example below which shows two incorrect matches in red and then ALL of the correct responses are listed below. The student will be awarded a percentage of the possible points based on the number of correct matches in their response.
Note: The above question is worth 11 points and the student earned 9 points because they answered 9 out of 11 correctly.
3) Student misses all of the matches
In this case, you will see all of the student's incorrect responses in red at the top. Again, ALL of the correct matches will be listed in green below the incorrect responses. The student will receive no points for this question.
Note: Points are NOT awarded in Practice questions. The points in this article refer to questions found in Quizzes or Tests.
Here is an article on how to create a Matching question.
If you want to understand how to change the point value for a question in your assignment, please read this article.