Hi,
It depends what you want to gain from it really …
If you are looking to become a dog behaviourist / trainer I would look at something like Bishop Burton College, if you just want to know more about your own dog I would reccommend either working 1:1 with a behaviourist (which will also deal with the tree/goalpost problem) or look at doing one of the ‘Learning About Dogs’ courses if you wanted something more “bite size”.
http://www.learningaboutdogs.com
Claire.