Most TEFL / TESOL providers do not incorporate this vital element as part of their training courses and instead rely on the peer-2-peer practice among the other native English-speaking trainees in the class, which does not provide the needed insight or experience needed.  Other companies that do advertise practice teaching in the real schools actually piled 15-20 TEFL trainees in a single classroom during a single 50-minute class to introduce themselves and take photos, but do not actually conduct any teaching practice or lessons. I am sure you would agree that practicing teaching to your fellow TEFL course classmates that speak English just as well as you do does not offer much of a situation to practice with real learners of ESL and does not give you the valuable insight needed to teach in a real classroom.  At Entrust TEFL we incorporate this extremely vital element during the last week of our training so that our students can enjoy three full days of teaching practice and observation at real schools to real learners of English as a second language. I can’t emphasize enough how valuable these three days are to our trainees as they gain valuable experience teaching full schedules in real schools under the close supervision of our professional trainers.