How do I end a lesson and disconnect my students?

How to end a lesson in teacher led mode and logout all student devices.

As the teacher, you have the ability to log all of your students out of the current lesson. 

Whilst running a lesson in teacher-led mode, open the teacher control panel and click End Lesson. A popup will ask if you are sure, as this will log all students out of the lesson. Click Yes to end the lesson for you and your students.