My experience was unique with TEFL courses. The practical part and task-based nature of the course can help me a lot in real life teaching situations. There is a practical side behind every good theory. In a sense that Ss know for sure that s/he can use what s/he has learnt in real life situations. If applicability is limited to the four walls of the classroom, then it is only good for special occasions.
Whenever all the pillars of teaching are present, there will be no barriers on the way of teaching and learning. There exist T(s), ELL(s), objective, and the most important of all application. There is a clear and vivid one to one correspondence between classroom activities and real life activities. They can be expanded and abridged. Ss can give comments on them and use them in related context.