One test, three schools, the whole conversation
It is the kind of local mechanism this TEDx event in Grantham exists to examine, and it looks nothing like the version of a good idea that TED talks usually put on stage: no applause, no polish, just a standardised score deciding which children in Grantham and the wider district get which kind of secondary education. Every September, thousands of Year 6 children across Lincolnshire sit two sets of papers that will shape the next chapter of their education. In South Kesteven, those sessions carry particular weight: the district is home to three grammar schools, and a single registration with the Lincolnshire Consortium of Grammar Schools makes a child eligible for all of them at once.
The three schools are distinct in character. Kesteven and Grantham Girls' School (KGGS) has educated girls in Grantham since 1910. The King's School Grantham — a boys' school founded in 1329, making it one of the oldest grammar schools in England — sits in the town centre. Bourne Grammar School, twelve miles to the south-east, is the district's co-educational option. All three use the same GL Assessment 11-plus, administered across two weekday or Saturday sessions each September of Year 6: Verbal Reasoning in the first week, Non-Verbal Reasoning and Spatial Awareness in the second. One registration, one sitting, eligibility across the consortium.
At The King's School, the qualifying threshold is a standardised score of 220 out of a possible 282. Reaching that mark matters — but it is only the first gate. Results land with parents in mid-October, just ahead of the 31 October secondary application deadline, and a qualifying score does not guarantee a place. When a school is oversubscribed, sibling priority and proximity to the school determine who is actually offered one.
That gap between passing the test and winning a place is where much of the real decision-making lies.
What a grammar school place actually requires
Qualifying matters less than it might initially appear once oversubscription enters the picture. A score above the threshold makes a child eligible; it does not make them certain of a place. Schools fill their remaining seats — after siblings — by distance, and in a district where all three grammar schools draw from the same pool of ambitious families, that distance criterion does more sorting than the exam itself in many years.
Bourne Grammar is the most documented local example. The school's 140 to 145 Year 7 places are regularly oversubscribed, and South Kesteven District Council evidence records families physically moving into Bourne to position themselves inside what has contracted to an effective catchment of roughly six to seven miles. This is not a side-effect of unusual demand — it is the predictable consequence of pairing high pass rates with proximity-based tiebreakers. When more children qualify than there are places, geography becomes the deciding variable, and families with the means and mobility to act on that knowledge do so.
For children in parts of South Kesteven with no nearby grammar option — Stamford and Market Deeping among them — the challenge is compounded even before transport costs are considered. A qualifying score still leaves the family facing a longer journey, with the county's free transport provision applying within traditional zones and not automatically covering all of the district's non-selective pockets. The exam is the same for every child, but what a pass actually unlocks depends considerably on the postcode it comes from.
Why the grammar schools set the local benchmark — and what TED talks assume about who gets picked
The numbers are not difficult to find. KGGS sends 89% of its students to GCSE with a grade 5 or above in both English and maths — a figure that places it well above most comparable state schools nationally. Bourne Grammar was historically ranked 46th in England for A-level results, with the great majority of sixth-formers progressing to university. These are real outcomes, and they circulate in local conversation about secondary education with considerable force.
What those figures also do, less visibly, is set the local frame for what a good school looks like. When one category of school consistently dominates the data that parents consult — GCSE pass rates, sixth-form destination statistics, league table positions — the meaning of 'quality' begins to align with a specific school type. That alignment shapes decisions well before any application is submitted.
For a family whose child might flourish on a vocational pathway, in a smaller school environment, or through a curricular offer a grammar school does not provide, that narrowing is not neutral. The grammar-school results become the benchmark against which every other local secondary is implicitly measured, despite the schools drawing from different pupil intakes. Non-grammar schools educate the majority of children in South Kesteven; the starting condition for any honest conversation about secondary provision here is that their results are read against a standard they were never designed to match. TED talks work on the same principle in a different arena: a speaker is chosen because the story or result is already unusually strong, and the recorded talk then stands in as a general benchmark for what a good idea or a good career looks like. Nobody watching sees the pool of ideas and speakers that did not get selected, in the same way nobody comparing league tables sees the pupils a grammar school's admissions process filtered out before results day.
The schools that absorb everyone else
The attainment data from selective local authorities has a structural explanation that sits upstream of any individual school. Lincolnshire is one of just 11 local authorities in England that the Department for Education classifies as 'highly selective' — meaning more than a quarter of all secondary pupils attend a grammar school. In areas configured this way, non-selective schools receive a specific kind of intake: the cohort that remains after the exam has removed a disproportionate share of high-attaining pupils.
The aggregate consequence shows clearly in the national data. Across non-selective secondary schools in highly selective local authorities, the average Attainment 8 score in 2022/23 was 42.3 and the average Progress 8 score was −0.16 — both statistically below the national average. These schools cluster near the bottom of national performance tables not because their teaching is weaker but because the grammar system has already reorganised who walks through their doors.
The evidence from selective areas suggests South Kesteven's non-grammar secondaries carry this same structural disadvantage. A school in Grantham or Stamford educating pupils who did not sit or did not pass the 11-plus is not a lower-tier version of a grammar; it is a different kind of institution serving a different intake, in a system designed to sort pupils before they arrive. Treating its results as a local performance failure rather than a predictable system effect misreads what the data is actually describing.
Who sits the test — and who doesn't
Inside selective local authorities — Lincolnshire among them — just 3% of grammar school entrants are eligible for free school meals, against 17.5% at other state schools in the same areas. Across England more broadly, FSM pupils make up only 6.7% of grammar intakes compared with 28.4% in non-selective schools within selective areas. The gap is not a quirk of a particular admissions cycle; it is a consistent structural feature of how selective systems distribute their places.
The Education Policy Institute traces the root cause to years before Year 6. Only 6% of persistently disadvantaged pupils ever reach the high-attainment level that grammar entry requires. By the time the September papers arrive, the divergence in literacy, enrichment, and educational support has already accumulated. The test does not create that gap; it reflects it.
Mitigations exist, though their reach is limited. The Lincolnshire Consortium funds free Atom Learning online tuition for FSM-eligible children — or those who have been eligible within the past six years — and schools direct Pupil Premium funding toward uniform grants, technology, and trip subsidies for enrolled disadvantaged pupils. EPI modelling suggests that even a reserved-places policy could raise FSM representation in grammars nationally only to 6.8%, benefiting around 1,000 additional children — a measure of how structurally embedded the disadvantage is.
Transport adds a further constraint. Free home-to-school travel is available within Lincolnshire's traditional county transport zones, but families from outside the county or from non-grammar pockets of South Kesteven must meet their own travel costs. Private tutoring also shapes who competes for places, though what it costs families in South Kesteven specifically is not captured in publicly available data.
What the choice actually looks like from here
The phrase 'good school' does a lot of work in South Kesteven, and most of what it carries is the 11-plus. When parents compare options, the results tables they reach for are produced by schools with selected intakes — children filtered for high attainment before they ever arrive. That is not a reason to dismiss those results, but it is a reason to read them carefully. A school's published outcomes and what a school achieves for its pupils are not the same measurement.
For children who do not qualify or do not sit the test, the picture that emerges from national data is a compositional effect, not a verdict on local teaching. Non-selective schools in highly selective local authorities like Lincolnshire educate the cohort that remains after selection has reorganised the intake — and their aggregate scores reflect that arrangement, not a failure of ambition or effort inside the building.
FSM figures for KGGS, The King's School, and Bourne Grammar individually are not publicly disaggregated, so the access patterns documented at county-wide and national level cannot be confirmed at the level of each South Kesteven cohort. County-wide and national findings are consistent enough, however, that local variation is unlikely to reverse their direction.
What a parent in South Kesteven is left with, practically, is this: the 11-plus is not simply a measure of readiness for a particular kind of school. It is a sorting mechanism that shapes who attends the district's highest-profile institutions — and by doing so, shapes the results those institutions publish. Understanding that before Year 6, rather than after National Offers Day on 1st March, changes what the choice is actually about.