The teacher asks questions quickly—usually 200 to 250 questions per hour. There is no dead time. The moment one question ends, the next begins. This forces the student to stop translating in their head. When the brain has no time to translate, it begins to think in English.
The Callan Method is a system for learning English quickly. It was invented by Mr. R. C. Callan in England. In this method, the teacher speaks fast. The students answer questions. The students do not write in a notebook. They listen, they speak, and they repeat.
Unlike homework where mistakes are marked a week later, correction is instant. You never practice a mistake repeatedly.