If you mistakenly add students to a class, or if a student is not a member of that class, you can remove the student from the course.
To remove students from a class, you need to:
Go to the "My Classes" section.
Click on the desired class.
Put the "Tick" next to the student's name you want to remove from the class.
Then click on the following icon:
Confirm your action in the pop-up window.