@Article{ authors = " Sisay Awgichew Wondemetegegn, Anwar Ahmed, Tamrat Zelalem", title = "The Role of the ‘Post Graduate Diploma in Secondary School Teaching’ Program in Improving the Quality of Teaching in Eastern Ethiopian Secondary Schools", journal = "Multidisciplinary Journal of School Education", issue = "2016 / Numer 1(9)", pages = "165 - 198" }