During the academic year 1992–93 HM Inspectors of Schools (HMI) inspected 1208 class music lessons in maintained schools in England. These included almost 400 lessons attended by pupils in their first, third or seventh year of statutory schooling, that is pupils to whom the National Curriculum applies. HMI found a wide range in the quality of the practice in both primary and secondary schools. However, the proportion of lessons which HMI judged to be satisfactory or better in at least one of three important dimensions was substantially higher in primary schools. Primary class teachers often under-rated the quality of their music teaching. Some principles for developing good practice were identified.