Sorted:

Can I set lesson active dates (start and due dates)? 

How can I listen to my students’ recordings?

How do I delete an Exercise? 

How do I delete a Lesson?

How do I invite students to a Class?

How do I create a Class?

How do I change the type of report displayed for students?

What is a Class, a Lesson and an Exercise?

Do you have any existing exercises that teachers can use?

How can I rearrange the order of my Lessons and Exercises?