The CALLAN Method teaches English in a quarter of the normal time. Instead of taking the usual 350 hours (four academic years) to prepare the average student through the Cambridge Preliminary, it takes only 80 hours (one academic year), and only 160 hours for the Cambridge First Certificate. Private Schools using the Method Anglo-Komp being an example are able to give all their students a legally-valid written guarantee that if they fail their FCE, state-school or university exams in the predicted number of hours, they will be given free lessons until successful.

For these exams most schools using the CALLAN method have a 95% pass rate, compared with the international average of about 70%. Such schools are also able to allow their students to take trial lessons before signing on (3 trial lessons free of charge unless signing on afterwards). The Method can guarantee excellent results with virtually every student. It involves little or no homework, and is easy, interesting and pleasant to use. The CALLAN Method used at Anglo-Komp is the quickest way of learning conversational English. During the lesson there are 12 600 words spoken as opposed to 3 000 in a traditional lesson. Learning English takes place in small standard groups up to 12 students or mini groups up to 6 students. Every student is entitled to free consultations which help them practise and make up lessons that have been missed.