Courses involve lectures, seminars and ESL class observation. Some include supervised practice teaching with foreign students. Some courses also provide supervised practice teaching . MA degrees are widely accepted by US employers and are normally required for jobs with universities and colleges. Courses are comparatively long and expensive.
Some courses provide little or no supervised hands-on training with foreign students.
If you intend to make a career in TEFL, you will almost certainly need to obtain an MA at some point. However, it is probably best to start by taking a good TEFL certificate course. This will enable you to gain some overseas teaching experience before deciding whether to embark on TEFL as a longterm career. All courses are rigorously monitored by Cambridge University. Courses provide practical training in proven classroom techniques for teaching EFL overseas.