The main objective of this study was to investigate the effect of class rules on noisemaking and interruption behaviour of pupils in Uruan Local Government Area. Quasi-experimental research design was used and the study population comprised 2, 204 primary five pupils in all the 45 public primary schools in Uruan Local Government Area. A sample size of 68 primary five pupils from two intact classes selected through purposive sampling technique. Instrument for data collection was Noise Making and Interruption Diagnostic & Rating Scale (NMIBDRS). The instrument was and validated by three experts and Cronbach Alpha Statistic was used to determine the internal consistency of the instrument which yielded reliability co-efficient index of 0.68. Mean (X ̅) and standard deviation (SD) were used in answering the research questions while analysis of covariance (ANCOVA) was used to test the hypotheses at 0.05 level of significance. The study revealed that there is a significant difference in the noisemaking and interruption behaviour of pupils exposed to class rules and those exposed to conventional behavioural management strategy. Also, there is no significant difference in the noisemaking and interruption behaviour of boys and girls exposed to class rules. Based on the findings of the study, it was recommended among others that teachers should adopt the class rules because it seems potent in managing noisemaking and interruption behaviour in pupils than the conventional behavioural management strategy.