* Field of Study: The master's degree should generally be in the subject the professor will be teaching. A master's in English literature is unlikely to qualify someone to teach organic chemistry.
* Doctoral Degree (PhD or EdD): While a master's is the minimum, a doctoral degree (PhD or EdD) is much more common, especially for tenure-track positions and those seeking promotion. Many colleges and universities prefer or require a doctorate for most teaching positions, particularly in research-intensive institutions.
* Teaching Experience: Even with a master's or doctorate, significant teaching experience (often at the community college or assistant level) is frequently a requirement or strong preference for many positions.
* Type of Institution: Community colleges may have slightly lower requirements than four-year universities or research universities. Some may hire instructors with only a bachelor's degree and extensive professional experience in their field, but this is less common.
In short, while a master's degree is the *minimum*, a doctoral degree is the standard for most college-level teaching positions, especially those aiming for long-term careers and professional advancement.