Boston High School 11+ Guide 2026: Admissions, Exam & Prep

Boston High School is a selective state grammar school for girls aged 11 to 16, with a co-educational sixth form, located on Spilsby Road in Boston, Lincolnshire. For September 2027 entry, girls applying to Boston High School must register for the Lincolnshire Consortium 11+ test, sit two reasoning papers in September 2026, and achieve the shared qualifying standardised score of 220 to be considered for one of the school’s 108 Year 7 places. This guide covers the school’s history, its distinctive Designated Transport Area and oversubscription criteria, the exam format, key 2026 dates, Ofsted and academic performance, and how to build an effective preparation plan — details that go well beyond the brief mention Boston High School gets in most general Lincolnshire grammar school round-ups.

Key Facts: Boston High School

About Boston High School: History and Character

Boston High School opened on 19 January 1921 at Allan House on Carlton Road, with a headmistress, seven teachers and 112 girls on the roll — a modest beginning for what has grown into one of Lincolnshire’s established girls’ grammar schools. The school outgrew Allan House within two decades and moved to its present Spilsby Road site in autumn 1938, with an official opening ceremony held on 9 May 1939, just months before the outbreak of the Second World War. During the war, the school took in girls evacuated from Hull, reflecting the disruption the conflict brought to schooling across the East of England.

The postwar decades saw steady investment in the Spilsby Road site: a swimming pool opened in July 1965, a £1.4 million sports hall opened in January 1992 (officially inaugurated by then Education Secretary Ken Clarke), and a French block and sixth form block followed in October 1993. The school’s Sixth Form became co-educational in 1992, meaning boys have studied alongside Boston High School girls in Years 12 and 13 for over three decades, even though Years 7 to 11 have remained a girls-only environment throughout the school’s history.

Boston High School converted to academy status on 1 January 2013, retaining its selective grammar school designation, its existing name and its uniform — a common pattern among Lincolnshire’s grammar schools during the wave of academy conversions in the early 2010s. The school today sits within Boston itself, a market town whose selective secondary provision is split by gender: Boston High School for girls and Boston Grammar School for boys, both members of the Lincolnshire Consortium of Grammar Schools, serving the town and its surrounding Fenland communities.

Is Boston High School Part of the Lincolnshire Grammar School Consortium?

Yes. Boston High School is a full member of the Lincolnshire Consortium of Grammar Schools — the group of 14 selective schools across the county that share a single 11+ entrance test, standardised across all applicants. This means a girl registering for Boston High School sits exactly the same two papers, on the same dates, as a child applying to Carre’s Grammar School in Sleaford or Queen Elizabeth’s Grammar School, Alford. A single qualifying score of 220 or above makes a girl eligible to apply to Boston High School and to any other consortium school the family lists on their Common Application Form, including other girls’ schools such as Spalding High School and Kesteven and Grantham Girls’ School.

The 14 Lincolnshire Consortium grammar schools and their published admission numbers are:

Caistor Grammar School, in North Lincolnshire, is the one notable exception: it sits outside the consortium and sets its own separate verbal reasoning test on different dates. Families interested in Caistor as well as Boston High School must register and sit tests separately for that school. For the wider regional picture, see our Lincolnshire 11+ hub guide and our companion guides to Spalding Grammar School and Queen Elizabeth’s Grammar School, Horncastle.

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What Does the Lincolnshire 11+ Test Cover?

The Lincolnshire Consortium entrance test used for Boston High School consists of two separate papers, marked on Optical Mark Reading (OMR) sheets and administered either at a girl’s own primary school or at a registered grammar school, depending on where she lives. There is no mathematics paper and no English comprehension or creative writing component — the entire test is built around reasoning ability.

Paper 1 — Verbal Reasoning (VR): Around 80 questions split across 15 sections, with a 50-minute time limit. Verbal Reasoning tests a girl’s ability to work with language patterns, codes, sequences and logical relationships between words. Question types include analogies, letter and number codes, hidden words, compound words, synonym and antonym matching, and word-relationship problems. A strong vocabulary built through wide reading, combined with quick pattern-spotting, is essential for this paper.

Paper 2 — Non-Verbal and Spatial Reasoning (NVR/SR): Around 70 questions across 5 strictly timed sections, with a 40-minute time limit overall. Non-Verbal Reasoning tests the ability to spot rules and relationships in abstract shapes: series, matrices, analogies and figure classification. Spatial Reasoning extends this into three dimensions, covering cube folding, block counting, shape rotation, nets and fold-and-punch problems. Each section is preceded by a short set of unscored practice questions so girls understand what is being asked before the timed section begins.

All raw scores are age-standardised before being combined into the final qualifying score, adjusting for a girl’s exact date of birth so that a summer-born child is not disadvantaged relative to an autumn-born classmate who has had almost a year more schooling. The two standardised scores are added together, and the qualifying standard across the whole Lincolnshire Consortium is a total standardised score of at least 220, a threshold intended to represent the ability of roughly the most able 25% of pupils in the county’s selective areas. Reaching 220 qualifies a girl for consideration, but as with all consortium schools, qualifying is a necessary but not sufficient condition: Boston High School’s own oversubscription criteria then decide who is actually offered one of the 108 places.

What Are the Key 2026 Dates for Boston High School Admissions?

For girls seeking September 2027 entry to Year 7 at Boston High School, the following broad timetable applies across the Lincolnshire Consortium. Boston High School’s own admissions pages confirm that the 11+ test is administered in September of Year 6 in collaboration with local primary schools, with results emailed to parents in mid-October:

Families must separately submit a Common Application Form to Lincolnshire County Council listing all their preferred schools before the 31 October 2026 deadline. Missing the CAF deadline means a child will not be considered through the coordinated admissions process, even if she sat and qualified in the 11+ test. Official registration and admissions arrangements are published on the Boston High School Year 7 admissions page and the Lincolnshire Consortium of Grammar Schools testing arrangements page. For the national context, see our 11+ exam dates 2025–2026 guide and our explainer on how 11+ standardised scores work.

What Is the Designated Transport Area and How Does Oversubscription Work?

Boston High School does not use a traditional fixed-boundary catchment area. Instead, Lincolnshire County Council defines a Designated Transport Area (DTA) covering 18 named primary schools, whose Year 6 pupils sit the 11+ test on-site at their own primary school as a matter of course. A further 8 primary schools outside the core DTA also have local testing arrangements. Girls from any other primary school — whether elsewhere in Lincolnshire or from outside the county — sit the test at Boston High School itself. This structure means any family can apply, regardless of address, provided their daughter reaches the 220 qualifying score; the DTA affects where the test is sat, not eligibility to apply.

Where more qualifying girls apply than there are places available, Boston High School allocates its 108 Year 7 places using a published order of oversubscription criteria:

1. Looked-after children and previously looked-after children
2. Children eligible for Pupil Premium — that is, children who have been eligible for Free School Meals at any point in the past six years
3. Siblings already attending Boston High School
4. All remaining qualifying girls, ranked by straight-line distance from home to school, calculated electronically by Lincolnshire County Council’s School Admissions Team

If two or more applications cannot be separated by distance for the final available place, an independent lottery, drawn by a person with no connection to the school, is used as the tie-break. In recent cycles the school has reported receiving in the region of 224 applications for its 108 places — a ratio of roughly 2.1 applicants per place — though the school itself notes that it has historically been able to accommodate all girls who achieved the required standardised score in a given year, suggesting the true competitive pinch point is usually the 220 qualifying score itself rather than the oversubscription criteria that follow it.

What Is Boston High School’s Academic Record and Sixth Form Like?

Boston High School’s Sixth Form has been co-educational since 1992, meaning boys join the school community from Year 12 even though Years 7 to 11 remain girls-only. Around three-quarters of the school’s own Year 11 pupils progress directly into the Sixth Form, and just over half of Year 12 entrants each year come from within the school itself, with the remainder joining externally from other Lincolnshire secondary schools. Girls and boys applying to join the Sixth Form from outside the school, rather than continuing from Year 11, sit a different assessment: the GL Assessment Cat4 test, covering verbal reasoning, non-verbal reasoning, quantitative reasoning and spatial reasoning, with an average National Percentile Ranking of 75% or above required, and neither the verbal nor non-verbal component allowed to fall below that 75% threshold.

Academically, Boston High School performs comfortably above local and national averages for a selective school. In the most recent published results, 76.5% of GCSE grades reached grade 5 or above in English and maths, against a 45.4% national average, and the school’s Attainment 8 score stood at 58.80 against a national average of 46.1. Its Progress 8 score of 0.00 indicates pupils make progress broadly in line with pupils of similar starting points nationally, which for an already high-attaining selective intake is a solid outcome. At A-Level, the average points score was 30.85. Around 73% of a recent leaver cohort progressed to higher education or other training, with roughly 13% securing places at Russell Group universities.

The school’s Good Ofsted rating — from a short inspection carried out on 16 July 2024 and published on 19 September 2024 — continues a long, consistent record: Boston High School was also rated Good at its March 2018 short inspection and its November 2014 full inspection. Inspectors in 2024 praised the school’s “inclusive and welcoming ethos”, noted that pupils “behave and attend well” and are “friendly and polite”, and highlighted strong subject knowledge among staff, well-supported provision for pupils with SEND through dedicated spaces, and a robust personal development curriculum. SEN provision at the school (0.37% with an Education, Health and Care Plan and 7.23% receiving SEN support) sits below the national average, consistent with a highly selective academic intake.

How Should My Daughter Prepare for the Boston High School 11+?

Preparation for Boston High School should focus squarely on the two subjects tested in the Lincolnshire 11+: Verbal Reasoning and Non-Verbal and Spatial Reasoning. Neither subject forms part of the national curriculum, so girls need structured, progressive practice well before the September 2026 test date.

Verbal Reasoning rewards both vocabulary knowledge and the ability to identify abstract patterns in language. The strongest foundation is wide reading — girls who read widely across fiction, non-fiction and quality journalism develop vocabulary organically, which pays off directly in synonym, antonym and word-relationship questions. Alongside reading, girls should work through the full range of Verbal Reasoning question types under timed conditions, since the roughly 37 seconds allowed per question in Paper 1 demands genuine fluency, not just eventual accuracy.

Non-Verbal and Spatial Reasoning is highly learnable but requires a different style of preparation. Many girls find NVR unfamiliar at first, since it draws on no academic knowledge at all — but with targeted, repeated practice on each question type (matrices, series, analogies, figure classification, cube folding, rotation and nets), most girls improve substantially over a preparation period of several months. The five strictly timed sections of Paper 2 also demand practice under sectioned, not just full-paper, timed conditions, so that a girl is comfortable working to the invigilator’s pace on the day rather than being caught out by a section ending mid-question.

Given that reaching the 220 qualifying score is genuinely the main hurdle at Boston High School — more so than the oversubscription criteria that follow it — a personalised one-to-one approach is particularly valuable: it lets a tutor identify precisely which question types or skills a girl is weakest in, and design a programme that closes those specific gaps rather than relying on generic practice alone. At Leading Tuition, our specialist 11+ tutors are experienced with the Lincolnshire 11+ test and support families across Boston, Spalding, Sleaford and the wider county, including through online tuition.