This again is anecodotal, but my wife is in the process of working on her master's thesis in history. She went for the master's for personal development reasons, but now that she is close to getting it she started looking at what she wanted to do to pay off the student loans and thought of teaching.
Once she finishes she will meet the requirements to apply as a full instructor at the multiple community colleges within commuting distance, and as and adjunct professor/instructor at both the local 4 year college and the university she is about to graduate from. To teach at the public high schools though, she will need to go back and complete classes in education the equivalent of another full-time year in college.
Practically speaking, at a minimum, she should be required to demonstrate an ability to student teach for a half year before being hired.
There are definitely some tricks to running a good classroom, but I have no idea if the education courses are in anyway connected to what is needed for the real experience. At a minimum, I would hope they would provide some guidance in how to compensate for different learning styles, how to properly handle difficult students, etc.
Once she finishes she will meet the requirements to apply as a full instructor at the multiple community colleges within commuting distance, and as and adjunct professor/instructor at both the local 4 year college and the university she is about to graduate from. To teach at the public high schools though, she will need to go back and complete classes in education the equivalent of another full-time year in college.