The key stage 2 datasets are compiled using information matched together from 3 data sources:
- prior attainment records (key stage 1 results)
- school census records
- qualification entries and results collected from awarding bodies
Key stage assessment data received from the Standard Testing Agency (STA) is combined with information on pupil's characteristics from the school census and prior attainment. Records are matched, using fields such as surname, forename, date of birth, UPN (unique pupil number), gender and postcode. This successfully matches around 60% to 70% of pupils.
Additional, more complex, routines are then applied to match as many of the remaining pupils as possible, up to around 98%. The coverage of the local authority and regional statistics is state-funded mainstream schools only in England. This includes schools and academies but excludes hospital schools, pupil referral units and alternative provision.
Because of the changes to the curriculum, figures for 2016 are not comparable to those for earlier years.
Any pupils who do not have a valid result for a subject are excluded from the calculations for that subject and do not appear in the number of eligible pupils or in the outcome percentages for that subject.
Valid results for the national test figures are:
- achieved the expected standard
- not achieved the expected standard
- special consideration
- working below the standard of the test
- unable to access the test
Suppression rules and disclosure control
Values of 1 or 2 or a percentage based on 1 or 2 pupils who achieved, or did not achieve, a particular standard are suppressed. Some additional figures may be suppressed to prevent the possibility of a suppressed figure being revealed. This suppression is consistent with DfE’s statistical policy statement on confidentiality (PDF).
Figures for the Isles of Scilly and City of London are suppressed in DfE’s key stage 2 provisional Statistical First Release as these local authorities have a single school and DfE do not publish school level information in the performance tables at the time of the provisional release. These figures are unsuppressed in the revised release as school level figures are already published in the performance tables.
Regional eligible pupil figures are rounded to the nearest 10 so that it is not possible to derive figures for these local authorities by summing the figures for the other local authorities in the region.
In the school level data, any figures relating to a cohort of 5 pupils or fewer are suppressed. This applies to sub-groups of pupils as well as the whole cohort, for example, if there were five boys and three girls in a school, DfE would not publish attainment for boys or girls separately but would publish attainment for all pupils as this is based on 8 pupils. The Code of Practice for Official Statistics requires DfE to take reasonable steps to ensure that their published or disseminated statistics protect confidentiality.
For more information about DfE’s disclosure control procedures for its statistical releases please see DfE’s statistical policy statement on confidentiality (PDF).
All charts, tables and downloads are rounded to the nearest whole number.