The project follows on from the UK standardisation of the Ravens Progressive Matrices Plus and the Coloured Progressive Matrices for Pearson Educational in 2003-05. In that project, data were collected from over 1,200 children in more than 120 nurseries and primary and secondary schools throughout the United Kingdom. The sampling plan was based on the national Census for the country, with representative proportions from each region, ethnic group and parental educational level and, of course, equal numbers of boys and girls in each group. In addition to the Ravens tests themselves, the accompanying vocabulary scales, the Crichton for younger children and the Mill Hill for those over 8 years, were also included. The published tests provide an easy and ready to use assessment of basic intelligence for the educational community.