The Callan Method is based on actual classroom practice, on the psychological teacher-student relationship, and on their relationship to the language. When the Method was shown to some educational psychologists, one of them said "How else?". In other words, as language learning is a question of developing quick reflexes, how else can this be done than by a system of stimulus and response? The same psychologist went on to take an exaggerated example, by adding that one could teach a monkey to play the piano, given such techniques. In other words the monkey, like a pianist, a typist or a language student, is learning to perform a trick, and tricks are best learnt through practice and through a system of stimulus and response, which in the case of the Callan Method means quick-fire questions and answers. The difference between the monkey and the pianist, typist and language student, however, is that the monkey cannot do much with the trick he has learnt, whereas the pianist, typist and language student can; for them the trick is a means to an end. For the monkey it is an end in itself.
ATTENTION PLEASE!!! This book is localized for Poland. Audio is only in English but the text is in English and Polish. But to my mind the text is very very easy so you can understand it without translation I am sorry for a delay in informing you of it.