I would love to learn more about coloration, but sadly I'm not close enough to attend a course, nor financially capable at the moment.
I might however suggest using a vidcast like livestream or a similar setup to produce a video class. Generally those turn out a lot more successful than simply regular courses, especially since you are able to edit the course material and access questions and editorial commentary via a broader selection of artists and prospective students and especially, educators. Teaching in my experience is a tough cookie. (Prospective teacher be I.)
The other positive factors of internet course-ware are the ability by the creator to edit or amend materials to better suit the students which a traditional course you can only reach a select number of students and those students would have to continually take your class to achieve the benefits of improved teaching by the teacher. Secondarily, the ability to affordably reach a larger number of students is of added benefit for both them and yourself. Finally, you don't have to leave home to teach. And with the schedule time at most people require for classes, it's just a pain...
Either way, good luck if you so decide to teach, in person, or online. And even if you do teach in a course setting, I'd still look into placing your courses online. Nice money maker (if they are well made) and they help us who can't be there in person. (Evil Grin for the sake of my own personal gain. ~heh- ^_^'