Hopefully most of you are aware that the attainment of a pupil (on average), and therefore school, is directly related to their prior attainment (say GCSE attainment and KS2 prior attainment).
There are quite a few posts along the lines of ‘a bright pupil should do well at any school’, so I thought I’d dig into the Gov data to see if it may be true.
For it to be true then the Progress of a pupil should be the same whichever school is selected.
The attached graph shows that a high (prior) attainer (High line) will do better at schools with a similar (to themselves) cohort. For low and middle prior attainers, they will do better in schools with a higher prior attainment cohort. All this is on average.
For context, the Value Add (Progress) measure is based on an average of around 1000, and as it is derived by comparing against other schools, not a standard value, then there will always be lower, and higher, than average values (regardless of whether all schools are progressing their pupils well).
And before anyone says, well my child is ‘this’ and they’re doing brilliantly at ‘that’ school – please remember we’re talking ‘averages’ here!