This book on management of students? discipline presents a research on the extent to which principals involve teachers and parents in students discipline management. Using ex post facto research design, data were collected through a self-administered questionnaire from secondary school principals, teachers and parents in Nyandarua and Laikipia Districts, Kenya. Data were analyzed using t-test and one-way ANOVA. Findings from the study revealed that more experienced principals, female principals, principals heading large schools, Day and Boarding schools, were more inclusive. This had a positive effect on teachers? and parental input in discipline management. Save for female headed schools, inclusion of teachers and parents had no beneficial effect on discipline in schools under more experienced principals, large schools and boarding schools. These findings have important implications on discipline management. Specifically principals should embrace an inclusive climate in their schools. Further research should be done to determine why inclusive approach did not impact positively on discipline in schools under more experienced principals, large schools and boarding schools.