I have just been playing around with these stats. I think they need a HUGE health warning. They appear to be based on teachers' internal assessments of the CfE levels across pupils. IME there is absolutely no consistency among different teachers within the same school assessing these levels let alone across different schools. I have an S4, an S3 and a P1. The S4 and S3 have subject levels ranging right across the spectrum depending on the interpretation of each teacher.
I was more interested in the stats for the Primary school. According to the stats my P1 is at by far the absolute worst performing school in the secondary school catchment area. However I know that DC from that primary school actually outperform all the other primaries when they all get to secondary and sit Nats 5 and 6 - it shows up in the stats as it is easy to map to the SIMD but I also know enough pupils to confirm it personally.
I was actually more interested in the SIMD data as our LA will benefit substantially from the increases to the education budget to tackle the attainment gap. Historically the very worst off schools have been identified and supported by the LA and the best off does ok through a combination of parent support and sharp elbows. I think large mixed catchment primary schools like the one my DD3 attends will benefit under the new attainment gap funding. Cynically I might say their results are bound to improve and flatter the Scottish Government because their assessments atm appear so out of kilter with the rest of the area.
I am also very opposed to choice in education but if some consistency in the measurement system can be adopted similar to the analysis of Nat 5 upwards results on the parentzone site then it might dispel some of the myths about what constitutes a good school and give some indications where to look at to find what works. Atm if I were on my first rather than my third DD I would be thinking about a placing request a mile along the road. My insider knowledge makes me confident my DD3 is much better off where she is.