The purpose of the study was to examine the school based factors affecting educational wastagernin some selected public secondary school of Finfinne zuria Special zone. The study adoptedrndescriptive survey research method, adopting both quantitative and qualitative approaches. Thernresearcher used a sample of 103 respondents. The study targeted 3 Woreda Education officers, 9rnPrincipals, 58 teachers, 3 supervisors, 20 repeaters and 10 dropouts. Purposive sampling wasrnused to select W.E.O.Heads, principals and supervisors. Whereas systematic random samplingrnwere used to select repeaters & teachers. On the other hand dropouts were selected by usingrnsnowball sampling techniques. Methods of data collections were questionnaires, interview andrndocument analysis. The data were gathered from teachers, repeaters, dropouts, supervisors,rnprincipals, and Head of woreda education officers, through questionnaires and semi-structuredrninterview respectively. Quantitative data were analyzed and interpreted employing frequencyrncounts, percentages, and grand mean. Qualitative data were analyzed through thematic analysis.rnFindings of the study revealed that in-school related factors such as schools facility gap, schoolrnmanagement style and teachers related factors contributed to educational wastage to very highrnextent as reported by majority 85% of teachers, 3 (100%) Supervisors, 8(90%) Principals,rn3(100%) W.E.O. Heads, 9(90%) dropouts and 17(85%) repeaters. According to the researchrnfindings educational wastage was due to poor school management style indicated by (grandrnmean value=4).Lack of teachers commitment and competency (poor teaching methodology, highrnturnover, high absenteeism) also another factor for educational wastage as reported by samernpercentage of response to effect of school management style indicated above. The school facilityrngap such as absence of teaching aids, absence tutorial class and high student-section ratiornhighly contributed to educational wastage as stated by majority 85% of teachers, 3(100%)rnSupervisors, 8(90%) Principals, 3(100%) W.E.O. Heads, 9(90%) dropouts and 17(85%)rnrepeaters. The research concluded that poor school management style, lack of school facilities,rnteachersâ€Ÿ commitment and competency were the major school based factors contributed torneducational wastage. The study recommends that; schools should decentralize their rulingrnsystem and should involve all concerned educational expertise while planning, implementing andrnevaluating educational goals by widening discussion opportunity. Schools should providernadequate teaching and learning resources to improve quality of teaching and thereby increaserncompletion and survival rate of students. Schools should give adequate and timely on jobrntraining& workshops to teachers and should ensure that teachers are treated fairly within thernschool to boost their moral.