Abstract :This study explored the control of students’ indiscipline in changing environment from secondary teachers’ perspective in Morogoro municipality. The reasons for the concern were rooted on the significant relationship between students’ discipline and academic performance. Despite research on school student’s indiscipline is a phenomenon in today’s contemporary education, interest has been predominantly to look for the cause, management and influence of the problem, some of which explored teachers’ and students’ perceptions so as to minimize impact of indiscipline of students’ learning and performance. Thus, why this study explores how students’ indiscipline controlled using teachers’ experiences in Morogoro Municipality in Tanzania secondary schools and fill that gap by establishing the control measures from stakeholder’ experience perspective evolved given the changing environment of schools over time. This study is underpinned by the Mc Gregory’s theory. Data collected through documentary review, questionnaires, interview and focus group discussion, Involving a sample of 109 teachers and 21 students from 7 public secondary school in Morogoro Municipality. The most frequent indiscipline behavior of students in secondary schools are smoking Marijuana and drugs, theft, boycott, truancy and absenteeism, fighting, assault and insult on teachers and non-teachers, vandalism, wearing dirty and improper uniform, pregnancy, and own phone in school. The results show that there have been some changes of indiscipline behavior from the 1980s to 2000s. Students girl’s pregnancy, bullying teachers, smoking marijuana and drugs use and to own phone emerged in the year 2000s-2021. Implicitly there is a changing pattern and nature of behavior with changing times may be because of influence of exposure ICT and social media. The most frequent indiscipline behavior control strategy, cited by the teachers was used, punishment that took various forms such as canning or manual labor, counseling, involving parents, transfer to other school, positive teacher-student relationship, provision of adequate teaching, game and sport facilities and for complicated case, School Boards were asked to intervene. Teachers proposed changes in education policies in handling students’ behavior to reflect to the changing students’ indiscipline patterns. Keywords : Indiscipline, Control, Perspectives, Changing Environment