Teacher Assessment - National Comparative Data?

The table above is taken from a document produced by EES for schools which, in the absence of any national comparative data, takes the sample of pupils from Target Tracker and analyses their performance. According to EES, this analysis document is based on anonymised data taken from schools using Target Tracker and only pupils who have been assessed against the ‘steps’ assessment scale have been included. As Target Tracker is used in 22% of English Primary schools and the nationwide pupil database contains approximately one million pupils, it is statistically relevant. This is the first indicator that might assist us in comparing ourselves to other schools in a meaningful way.