The problem that I found was to select a range of batlae to mimic the karok audio and distinguish sounds, light, heavy, because the instructor takes less is not enough to teach pronunciation to mimic sounds.
Problem is to choose the practice and mimic sounds and speech discrimination chest heaviness because not enough teachers to spend less time in teaching phonics to imitate.
The problem was that the discrimination and imitating the voice and distinguish sounds lightweight because those teaching takes a little enough in teaching pronunciation imitation sound.