Once upon a time, someone pursuing a teaching education studied at a particular college that based its entire curriculum on cranking out school teachers. As the entire industry of education has evolved and become more complex over time, so has obtaining a teaching education.
Today's acceptable teaching education only begins with a bachelor's degree in education, once the end result instead of the beginning.
A teaching education must be followed up with a state licensing examination that is presented by the board of education in whichever state a fledgling teacher wishes to work. Educational and licensing requirements differ a bit from one state to the next but, for the most part, the education and exam are pretty much the same.
Many school teachers today supplement their teaching education during their own college years with classes in any specific field of interest they'd like to teach later. For instance, someone interested in coaching an athletic team must also study coaching, anatomy, physiology, and other subjects which would be needed on the playing field.
Classrooms are becoming more and more computerized, and so is the workplace school prepares the student to excel in, so many public school districts require teachers in highly technological areas of study to have some formalized training in these technologies in addition to the standard teaching education required for a bachelor's degree. A growing number of public school districts are requiring training in new technologies of all school teachers.
Vocational courses of study are growing in popularity in the secondary public education system as the workforce becomes more competitive and school teachers who can supplement their teaching education with expertise in the trades, such as cooking, carpentry, and auto mechanics, for example, are highly valued as teachers of these programs.
While it isn't required in many public school systems, an advanced teaching education, such as a master's degree, qualifies the school teacher for positions in administration or as principals of a school. Larger schools with departments for different areas of study, such as a science or English department, require their department heads to hold an advanced degree in these areas of study.
As the public education system continues to evolve, becoming more complex as it does, a teaching education doesn't stop once the work begins. Almost all states require their school teachers to complete continuing education classes on a periodic basis in order to keep their teachers' licenses current.