A Post-Graduate Course I might do

Hi All,
Today I am going to consider a very important topic to anyone who works, or who is a professional: How to stay truly up-to-date in the field.
Often we study something, get a degree in it, and start working. Years may pass. Over the years we're doing what we do. We probably do it well and enjoy it. However, things change, and it is a good idea to really know what is going out there in the wider world.
As an English teacher, this concerns me too. Therefore, I would like to take a degree course called something like "updating your language teaching skills"--I suppose it would be called something like that, something similar. It's been a while for me since I was a student, and getting refreshed might do me good.
I'd love to become reaquainted with ideas about English and its role in the world. I'd be interested in taking classes on writing instruction, and on keeping classes entertaining and relevant. Perhaps, incorporation of technology in classes would be a good idea too.
Since I work, and I really can't stop, for me at the moment, the best modality for a course of study would be distance. I know that this brings about challenges, and I enjoy being in the class with classmates, but for the sake of practicality, I would have to do it like this. I've heard of an interesting distance course that offers a degree in what I'm thinking about that is based in England, so I suppose I'd chose that course. I certainly wouldn't mind having to go there once before I graduate. I could mix travel, tourism, and study!
Studying on-line at a distance requires personal discipline. You basically have targets and goals to meet, which means you have to set your own times. You need to maintain your study times on your own, which is not that easy, especially if you're alone and don't have physical contact with the teacher or classmates. However, I think I'm self-disciplined enough to do it.
Now, the big question is: when do I start (amd how much is it?)?