Learn language through stress and anxiety
How many students do you think would enroll in a program where stress and anxiety were promoted in the classroom? No language school on the planet promotes stressful classrooms but most schools have created that very thing. Why is that?
When you are required to speak a second language, one you don't know well, it's stressful. Add to this all your classmates watching you create a stressful class. Wouldn't it be better if language students spoke only when they felt comfortable? There's research that shows we learn better when we're relaxed - that's why TV ads are so affective.