From Monday, 31st August 2009 to Friday, 4th September 2009 there is going to be Ubuntu developers week. This is a event you can't afford to miss and all you need to attend is an IRC.
Check your timetable for the class here.
If you need to prepare for the session click here.
Then join #ubuntu-classroom for your desired class. This class is muted so if you need to talk or ask question do it in #ubuntu-classroom-chat. Remember questions are prefixed with QUESTION.
More info here.