Don't forget about the existence of the Park Language Lesson Blog, which is presently tracking AS lessons, and has archives of A2 Language Diversity and Child Language Acquisition lessons from previous years.
Invaluable for revision for A2s especially, and crucial to follow for current AS students -- just put your email in the box in the upper right corner (they may send you a confirmation email, so check your inbox!) and you'll have a summary of each topic winging its way to you a couple of days after the lesson -- I usually update on Mondays and/or Thursdays.
