On the subject of recording sessions. I would think it could be sensible to do that yourself and place them on youtube. It would be a good way to advertise. There are a lot of very good lessons out there anyway. I particularly like mindyourdecisions with Presh Talwalkar. He presents some really good maths problems, ideal for A level students. If anyone has seen his videos and knows what software he uses to create them I would be interested because I think it would be a good way to present online lessons.