As soon as the class is done, you'll see the screen to rate in terms of satisfaction, punctuality and will be given a chance to write your opinion. We'd like to garner your unedited thoughts. The uncensored thoughts would help others in class selection.
When the class is finished, you will see a screen where you can rate the class on the teacher's punctuality, your class satisfaction and being able to leave short comments. If you miss the opportunity to do this, you'll be able to complete the above jobs from 'Class History' on your 'My Page' later.