The Fischer Family Trust Data Analysis project produces estimates of likely attainment. Types A and B are based upon the progress made by all pupils (nationally) in the previous year. Type A is based upon pupils’ prior attainment, type B takes into account prior attainment and the socio-economic context of the school. Type C is based upon what you would need to do to play your part in achieving either national or LA targets. Type D is based upon the progress made by schools in the top 25% percentile of value-added scores nationally.