The main objective of this study was to investi gate the factors influencing the effectiv ernimplementati on of CPO Program in Addis Ababa city administration. To accomplish this purpose, arndescriptive Survey method was employed. Data for the study were collected u si ng Questionnaires,rninterview and documen t analysis. By Purposive sampling method from Addis Ababa cityrnadministration, Abiyot Kirs, Oerartu Tullu and Lafto secondary schools were selected as a sample.rnIn the study 109 Teachers participated on filin g the questi onnaires and 15 Teachers havernParticipated on interview in number 6 teache rs, 3 Unit leade rs, 3 directors, 3 sub city EducationalrnExperts have Participated on an interview and document analysis is also took place in selectedrnschools and portfolio of six teacher, two teachers from each sc hool have been seen. Data ob tainedrnthroug h questionnaires were qualitatively described and interpreted a nd co mbin ed with therninformation obtained throug h interview were qualitatively described in to supplement thernquantita tiv e data. Th e result of data analysis and interpre tation indicated that the support given tornteachers both pre-services a nd post practice was low, the supports provided for teachers after, theyrnstarted teaching and follow up-system was also very poor it was considered the only responsib ilityrnof the sub city T OP expertise and supervisors, the attitude of teachers towards the CPO programrnwas found negative, and the id ea of the teachers and directors shows contradiction on CPOrnactivities. On the bases of these major findings conclusions were made in chapter five. Finallyrnrecommendations were suggested.