My school district would not subsidize my registration fee.
I did not want to travel to Tyngsborough.
I do not know, or was not interested in, the keynote speaker (Connie Jacquays).
I had a prior commitment on the date (May 4, 2013).
I did not receive enough reminders to register before the deadline.
The 2013 conference didn't have enough workshop offerings for my particular grade level.
The 2013 conference's workshop offerings were too basic for my skill level.
Because the 2012 conference did not meet my expectations, I did not consider attending the 2013 conference.