No school or university of any type offers an MSc in teching. Teaching is not a part of science; it comes under Education.
"school's?"
I would like to know which schools in the United states offer a master's degree in library science completely online without having to take the GRE exam?
Unlike the more traditional curriculum, such as math, science, social studies, etc., there really is no nationally standardized method of teaching music. Some schools do not even offer music as a class.
There are many people who choose to get a master's degree in computer science. There are a number of colleges and universities that offer computer science as a master's major.
Bennington College The Degrees conferred and Certificates awarded by the college are Bachelor of Arts, Master of Fine Arts in Performing Arts, Master of Fine Arts in Writing and Literature, Master of Arts in Teaching, Master of Arts in Teaching a Second Language and Post baccalaureate Certificate in Premedical and Allied Health Sciences.
There is Alaska Art schools that offers a master degree in art education.
"Most schools do offer master's degree programs. In New York, some of those schools are The City University of new York, Buffalo State, Columbia University and NYU."
Yes, most schools offer a lot of their classes online. Some of the science classes are not available online because of labs and on-hands teaching.
Masters of science and master of arts degrees are academically focused programs. Masters offer students specialized training in areas such as business, teaching, health or communications or art.
A master's degree would take approximately two to three years to complete depending on the credit load carried per semester. However, there are some schools that offer accelerated programs of study.
Online colleges are growing and branching out all the time, and more established, notable schools are starting to offer broader online programs. With the advent of these programs, any university in your area with a Master's program can give you a shot at a Political Science degree, but I'm not sure it would be an MA.
Political science is a four-year degree offered by a university. It is a popular major among students who plan to attend law school. While some schools call it a "political science" degree, other schools do not offer it as such, but similar coursework would render a history degree with a major in political science. Several schools offer graduate degrees in political science: http://grad-schools.usnews.rankingsandreviews.com/best-graduate-schools/top-humanities-schools/political-science-rankings
In New York, Excelsior offers a Master degree program in arts. There are also on-line schools which offer a Master degree in art.