Lower secondary school teachers from six different schools in one Norwegian municipality reported on the prevalence of problems among pupils entering lower secondary school and types of problems among pupils in Grades 8-10. Teachers report that the transition from Elementary to Lower secondary school is problematic for approximately 30% of the pupils. About 70% of the teachers report that 25% or more of pupils transitioning to Grade 8 lack academic experiences and skills and have problems following directions. There is also a tendency for teachers who report higher values on professional (un)certainty about pupils' learning and on two efficacy variables included in the study, to be more favourably inclined towards inclusion of children who are perceived as having learning or behaviour problems. Additionally, teachers who report higher values on efficacy scales tend to report lower values on problems among pupils, and teachers who are less favourable towards inclusion report higher numbers of pupils having problems. The results are discussed in relation to schools as workplaces and professional development for pre-service and in-service teachers. (Contains 4 tables.)