There are two entities in my app: Class and Student, they are many-to-many relationship, like following:![enter image description here](https://i.stack.imgur.com/QIEm9.png)

My problem is that in my app, there are two status of student in a class: pass and fail. I don't know how to model it to class or student. For example, should I make another Entity to express the status of a student? Or just adding a status attribute to Class entity?