1. Login as instructor to a site and make sure there is a student in it
2. Click on 'Lessons' > 'Add Content' > 'Add Student Content'
3. Now login as Student
4. Click on 'Lessons' > 'Add Your Own Page' >
5. Click on 'Add Content' > 'Embed content on page' and upload a file > 'Save'
6. Now login back as instructor and refresh the lessons page
The number of times lessons page is refreshed, those many 'Student pages' are added to the Lessons page