The live lessons page shows every Lesson that's in progress right now and who has joined each one. It's useful for checking at a glance that Tutors and Students have made it into their Lessons, without opening each Lesson in turn.
Opening the page
On the Dashboard, use the Live view link in the Today section. The page refreshes itself every 15 seconds, so you can leave it open.
Who can see it
Administrators see every running Lesson in the organization.
Tutors see only the Lessons they teach.
Note: While a Lesson is still running, someone who hasn't joined yet may be a latecomer rather than absent. Attendance is only final once the Lesson is over.