The Society is an Association of Headmasters and Headmistresses of just over 100 well-established Independent schools.  It is one of the constituent organisations of the Independent Schools Council.  SHMIS was formed in 1961 when a group of Heads decided they needed a forum in which to share ideas and experience.  Since then the Society has grown substantially in size, reputation and effectiveness.  SHMIS now represents schools of all sizes throughout the country with a couple of valued overseas members.  Many SHMIS schools have a boarding tradition; a number are at the leading edge of education in music, dance and the arts; and several are well-known for their effective support for those with learning difficulties.  Care for the individual child is at the heart of all SHMIS schools and the Society itself provides a supportive network for its member Heads.