The present study was conducted to investigate the relationship between school-based practices and students' discipline in secondary schools. The school-based practices that were focused on were: Managing access procedures, managing students' identity and sensitisation of students on rules and regulations. The study adopted a correlational research design in order to establish the relationship between the dependent and independent variables in question. A total of 351 students and 93 teachers were selected using simple random and stratified sampling. A closed ended questionnaire was administered to both respondents and the data obtained were entered and analyzed using the statistical package for social scientists (SPSS). It was found that the sensitization activities and managing students' identity had a positive but low effect on the students' discipline while managing access procedures had a slightly high influence. The study generally showed that, there is a moderate positive relationship (r = 0.559) between the school-based practices and the students' discipline. This was tested to be statistically significant at 0.01 level with p<0.05.