There are Michigan school districts that are using MOOCs (Massive Open Online Courses) for high school credit.
www.phoenix.edu is one online school which offers graduate courses online. www.waldenu.edu is also another website of an online school which offers graduate courses.
There are a number of educational institutions that offer online high school courses. The sites for Penn Foster, Stanford University Online High School, and Keystone School, for example, each offer these courses.
You can enroll in online high school courses and earn your high school diploma online anytime, anyplace and on a flexible learning schedule. You will be fully supported through your online high school program. Search on the net.
Kendall School of Art and Design is a well respected art school. They offer both classroom and online courses.
keystoneschoolonline.com is an online middle and high school they have more then 170 teacher-supported online courses and the courses can be taken on your own schedule.
No, a school does not have to be accredited to offer online correspondence courses. However, if I were a student I would aim for a school that does, because it would look better on my transcript.
One can find information on MBA online courses online. The Rutgers Business School website has information on MBA online courses available for one to access.
Harvard Extension School - www.extension.harvard.edu
If your medial school accepts the credits you earn form medical school courses online, then sure, go for it. But you should take classes that aren't too important.
If you want to take photography courses check out www.schoolofphotography.com. School of photography provides multiple photography courses online including beginner courses and tutor assisted courses.
You do not necessarily need a high school diploma to enroll in online college courses or even attend some community colleges.
There are many colleges that offer online nursing courses. To find a school that offers a class that fits what you need you should first contact a local school.