Metric permalink
Disadvantage attainment gap (KS4, England)
Part of the Childhood and Social Floor domain. Disadvantage gap index at Key Stage 4, measuring the attainment difference between pupils eligible for free school meals and their peers.
Latest data
Latest reading
2024
A higher reading is treated as worse for this indicator.
Score composition
Stress score
Blended from three components: (60% weight), trend (30% weight) and volatility (10% weight). Full formula on the methodology page.
Level · 60% weight
Percentile: this metric is scored against its own history, where today sits between its best and worst recorded years.
Trend · 30% weight
Measured from the direction and size of the change between the two most recent readings.
Volatility · 10% weight
17Measured from how much this indicator has swung period on period across its recorded history.
Data confidence and provenance
Confidence and source
How much weight to put on the reading, the mean data-confidence across the component metrics (source quality, recency and completeness).
Source
Key Stage 4 performance
- Update frequency
- Annual
- Reliability
- high
Provenance
- Provider
- DfE
- Series ID
- 18e39901/CdRId
- Frequency
- AY (DfE EES API)
- Accessed
- 13 August 2026
Known weakness
Annual frequency and definitional changes to the gap index methodology in 2019 limit long-run comparability before and after the reform.
Notes
Verified official value from DfE (18e39901/CdRId), accessed 2026-08-13.
Historical values
History
| Period | Value | Relative |
|---|---|---|
| 2010 | 4.07 | |
| 2011 | 3.89 | |
| 2012 | 3.8 | |
| 2013 | 3.74 | |
| 2014 | 3.79 | |
| 2015 | 3.78 | |
| 2016 | 3.66 | |
| 2017 | 3.68 | |
| 2018 | 3.7 | |
| 2019 | 3.66 | |
| 2020 | 3.79 | |
| 2021 | 3.84 | |
| 2022 | 3.94 | |
| 2023 | 3.93 | |
| 2024 | 3.92 |