Swaziland is planning to introduce inclusive education as part of education for all. The innovation may benefit learners with emotional and behavioural disorders (EBD). A purposive teacher sample (N = 47) was used to generate and identify behavioural problems that are prevalent in Swazi schools. Aggression was one of the many conduct disorders cited. Using a purposive sample of 300 students, the study found aggression to be indeed a problem among upper primary and junior high school students. The type of school attended was found to be correlated with aggression. Students with moderate to severe aggressive behaviours were found on all categories of learners used in the study. However a significant difference in the number of aggressive students was obtained on only two variables, the type of school students attended and the kind of guardians students lived with at home. There were more students with aggressive tendencies in government schools than other types of schools. Furthermore, aggressive students lived mainly with both biological parents. Teachers rely mainly on punishment to deal with aggressive students. The findings have implications for the ongoing educational reforms concerning inclusive education in Swaziland. Three major recommendations were made to address them. Teacher skills in handling aggressive cases need to be enhanced by both preservice and inservice courses. School counselors need to be appointed to provide suitable psychological intervention. Finally, a more detailed investigation using qualitative procedures was recommended to gain in-depth insights into the problem and its solutions. (Contains 5 tables.)