Tweet The Callan Method is used exclusively in language schools and requires a Callan Method-trained teacher who can speak to his students in English at the rate of 200 to 240 words a minute. This is faster than normal conversational speech, which is only about 120-150. The teacher’s accelerated speed approach prevents boredom – that was Callan’s objective. He was not aware of SCT and did not realize that his method worked because his students did not have time for subconsciously using their mother tongue. The Callan teacher is allowing students to hear more words repeated more times. This makes it easier for students to understand English outside the classroom, and, of course, makes them learn faster. The Callan school is unique in providing a written warranty that their students will learn English four times faster.