This study explored the Practices and Challenges of School Improvement program inrnGovernment Secondary Schools of Addis Ababa. Descriptive survey method was employed.rnThe subjects in this study were 222 teachers, 8 principals, 24 vice principals and 8 supervisorsrnbeing a total of 262 respondents. Simple random sampling technique was employed to selectrnrespondents of the study. Frequency count, percentage mean, median and standard deviationrnwere used to analyze the collected data. The study used more of quantitative method so thatrnquestionnaire, interview and observation were the main instruments of data collection. Thernresult of the study revealed that insufficient preparation of School leader for planning of SIP,rnlack of evaluation and prioritizing needs, and poor resource utilization practices were identified.rnFurthermore, insufficient continuous professional training for School Leaders, Lack ofrnCommunity involvement, lack of moral and commitment of School Principals, Lack of creatingrnhorizontal harmony, were the challenges faced on the implementation of SIP. Thus, suchrnsituation made it difficult for School Leaders to lead School for improvement. Based on this, itrnwas recommended that Addis Ababa Education bureau take appropriate measures includingrnsupply of adequate material and financial support to schools and provide needed training andrnadministrative support for School Leaders and take necessary measures to minimize problemsrnthat hinders the implementation of school improvement program, so that they would better bernable to lead School for improvement.