Conduct problems in school settings can pose significant challenges for both children and teachers. This study examined the teacher-reported prevalence of conduct problems in a sample of young children (N?=?445) in the first two years of formal education. A secondary aim was to assess teachers' perceptions of child behaviour and their classroom management strategies. The study was undertaken in 11 schools located in south west Ireland. Overall, children displayed positive socio-emotional and behavioural adjustment, although more than one-quarter had difficulties outside the "normal" range. Class size and gender were shown to play a role in the level of difficulties experienced. Teachers reported significant challenges in managing classroom behavioural problems. This study provides some useful insights into the socio-emotional and behavioural needs of school-entry age children. The findings also have important policy and practice implications for school psychologists and other key school personnel and highlight, in particular, the need to develop and implement early intervention and prevention strategies in schools.