For the purpose of improving KOSEN students' speaking and listening skills in English, the Direct Method, considered as a past English teaching pedagogy, is focused. Short-term intensive on-line English conversation lessons used with the pedagogy is applied to 4th grader students as a trial basis. In this paper, first the teaching pedagogy, Callan Method known as one of the Direct Methods is briefly introduced. Then, in order to confirm the effectiveness of this method, the above-mentioned two English skills are tested before and after the trial by TOEIC IP Test and TOEIC Speaking Test, respectively. As a result, although the effectiveness of this method associated with speaking skill was not verified, that of listening skill was confirmed. We propose an English class design in KOSEN using this method.