ITRO A JOURNAL FOR INFORMATION TECHNOLOGY, EDUCATION DEVELOPMENT AND TEACHING METHODS OF TECHNICAL AND NATURAL SCIENCES Issue frequency Twice a year – electronic and paper issue Volume 4, Number 1, 2014. Publisher University of Novi Sad Technical Faculty “Mihajlo Pupin” Zrenjanin Department of Teaching Methods of Science and Education Technology Chief and responsible editor Professor Dragana Glusac, Ph.D. Program editor Docent Dijana Karuovic, Ph.D. Editorial board Professor Dragica Radosav, Ph.D. Professor Ivan Tasic, Ph.D. Docent Vesna Makitan, Ph.D. Docent Marjana Pardanjac, Ph.D. External associates Professor Milka Oljaca, Ph.D, Faculty of Philosophy, Novi Sad Professor Dragoslav Herceg, Ph.D, Faulty of Natural Sciences, Novi Sad Professor Zorana Luzanin, Ph.D, Faculty of Natural Sciences, Novi Sad Professor Marta Takac, Ph.D, Teacher’s Training Faculty, Subotica Technical preparing of the Journal Еrika Eleven, М.A. ISSN 2217-7949 Translator Erika Tobolka, Ph.D.