Instrumental teachers in higher music education in Norway and elsewhere traditionally organise their teaching as individual lessons with one teacher and one student. This paper takes a closer look at how a horn teacher at the Norwegian Academy of Music has organised her weekly teaching in individual, small group and master class lessons with all her students. The project being described in the paper has since been extended to other instruments, but this paper concentrates on the horn model. The main focus is on small group lessons where the students themselves play and comment on fellow students' performances. The evidence suggests that a combination of teaching in individual, small group and master class lessons is the best way of educating students as responsible, reflective and professional musicians.