A system and method for producing a normalised output of a characteristic of a monitored and developing entity are described which provide comparative assessments of both the attainment, relative to some predetermined baseline, and progress, relative to some prior point or period in time, of a predetermined set of pupils in a particular educational year or class. The method provides for the normalisation of historically recorded grade data using a look-up table whereby grade data, traditionally being one of a plurality of grades within a relative or absolute grading system, is converted to an underlying numerical representation. This numerical representation is then compared with a similarly normalised grade from baseline data so that a difference value between actual attainment and required or desired attainment is obtained. The difference value is then used as the basis for an interpolation within a predetermined colour palette, such that the attainment of one, some or all the pupils within the particular set is expressed as a colour. By such means, underachievement or overachievement of a set of pupils can be immediately assessed.
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