11+ Analytics
Score distributions, pass rate trends, and state vs private comparison across 71,000+ pupil records and 9 years of Buckinghamshire STT data.
Total Students Tested
73,678
across 9 years (2017–2025)
2025 Pass Rate
36.8%
2,527 of 6,867 qualified
Schools Tracked
397
primary schools feeding Bucks grammars
State vs Private (2025)
State Schools
34.8%
6,267 students · 238 schools
Private Schools
57.8%
600 students · 31 schools
Private Advantage
+23.0%
private schools pass rate is 1.7x higher
Avg Pass Score (State)
133.1
Avg Fail Score (State)
98.1
Avg Pass Score (Private)
134.6
Avg Fail Score (Private)
108.2
Note: State schools typically register all pupils for the STT regardless of ability. Private schools are more selective about which pupils they enter, and many private school families are not seeking grammar school places. This makes direct pass rate comparisons between state and private schools misleading.
Avg Score
111.4
121 = qualifying score
Pass Rate Trend
+4.0%
since 2016
Qualifying Score
121+
standardised transfer score
Data Source
TBGS Consortium
official publications
Score Distribution
Number of students at each STT score. The dashed line marks the 121 qualifying threshold.
Pass Rate Trends
Average Score Trends
Students Sitting the STT
Pass Rate by Gender (2017-2025)
Overall STT pass rates for boys vs girls across all feeder schools.
Pass Rate by Ethnicity
STT pass rates by ethnic group. Groups with fewer than 20 students excluded.
| Ethnic Group | Students | Qualified | Pass Rate | Avg Score |
|---|---|---|---|---|
| Asian Indian | 743 | 496 | 66.8% | 124.6 |
| Refused / Not Stated | 244 | 147 | 60.2% | 122.8 |
| Asian Any Other | 210 | 118 | 56.2% | 120.3 |
| Mixed Other | 197 | 88 | 44.7% | 114.8 |
| Other Ethnic Group | 80 | 30 | 37.5% | 109.2 |
| Mixed White & Asian | 151 | 50 | 33.1% | 111.7 |
| White Any Other | 436 | 113 | 25.9% | 106.6 |
| Black African | 179 | 46 | 25.7% | 104.3 |
| Asian Pakistani | 596 | 149 | 25% | 103.1 |
| White British | 3,045 | 698 | 22.9% | 105.4 |
| Mixed White & Black Caribbean | 105 | 9 | 8.6% | 98.2 |
Pass Rate by Birth Month (2025)
Does being born in summer (younger in the year group) affect 11+ results? The data shows the impact is minimal.
Year-by-Year Summary
| Year | Schools | Students | Qualified | Pass Rate | Avg Score | State % | Private % | Gap |
|---|---|---|---|---|---|---|---|---|
| 2025 | 269 | 6,867 | 2,527 | 36.8% | 111.4 | 34.8% | 57.8% | +23.0% |
| 2024 | 280 | 6,914 | 2,575 | 37.2% | 111.9 | 34.7% | 62.6% | +27.9% |
| 2023 | 371 | 8,591 | 3,016 | 35.1% | 112.3 | 33.4% | 54.4% | +21.0% |
| 2022 | 343 | 8,271 | 2,956 | 35.7% | 112.1 | 33.5% | 60.6% | +27.1% |
| 2021 | 352 | 8,184 | 2,891 | 35.3% | 112.0 | 33.2% | 55.7% | +22.5% |
| 2020 | 393 | 8,844 | 3,022 | 34.2% | 111.8 | 32.2% | 54.1% | +21.9% |
| 2019 | 396 | 9,064 | 2,942 | 32.5% | 111.1 | 30.6% | 50.4% | +19.8% |
| 2018 | 397 | 8,862 | 2,962 | 33.4% | 109.8 | 31.0% | 57.0% | +26.1% |
| 2017 | 355 | 8,081 | 2,650 | 32.8% | 98.1 | 30.1% | 58.3% | +28.2% |