Master of string pedagogy
I've been thinking about doing a master's in string pedagogy for a while. My main questions are, is it worth doing and if it is where is best to go to study?
Sorry, but the question is a little vague. Do you want to know if it is worth the money you'll pay or the time spent on the degree? I think it depends on what your goals are.
Depends on where you see yourself after that. Will you be a Violin teacher with supplemental playing income, or a player with supplemental teaching income? In either case you want a large, prominent music department. Some schools will use grad. students to teach some of the private lessons, as part of their pedagogy training.
I agree with Rebecca about the vagueness of your question, but I think it's still basically answerable. You do a master's degree if it's going to bring joy to your life (by allowing you to do a deeper dive into an academic subject that you love) or if it's going to increase your earning power. Either of those objectives can make it worth the time and expense, but if you're after the earning potential then you need to calculate that as dispassionately and realistically as possible.
If you want to give yourself an excellent foundation as a private teacher in a structured setting, then possibly yes depending on who the professors are in the program you choose.
One thing you can do is to find a great program and try to get the reading lists for those courses. Then you can consider buying those books (previous editions which are cheap as used books will probably do just fine) and getting a lot of knowledge that way.