Boston Grammar School 11+ Guide 2026: Admissions, Exam and Preparation

Boston Grammar School is a selective state grammar school for boys aged 11 to 18 in Boston, Lincolnshire, with a co-educational Sixth Form, tracing its foundation to a charter granted by Philip and Mary in 1555. For September 2027 entry, boys applying to Boston Grammar School must register for the Lincolnshire Consortium 11+ test administered by GL Assessment, sit two reasoning papers in September 2026, and achieve the shared qualifying score of 220 to be considered for one of the school's 120 Year 7 places. Competition is real: recent cycles have seen around 2.2 qualifying applicants for every place, and there is no catchment area, so distance is used only as a final tie-break. This guide covers the school's history, its admissions criteria, the exam format, key 2026 dates, Ofsted and academic results, Sixth Form entry, and how to build an effective preparation plan.

Key Facts: Boston Grammar School

About Boston Grammar School: History and Character

Boston Grammar School's origins stretch back further than almost any other school in Lincolnshire. The school was established by royal charter granted jointly by Philip and Mary in 1555, making its foundation contemporary with the Marian/early Elizabethan grammar school movement. The oldest surviving part of the school's South End site — originally known simply as the “big school” and now serving as the school library — was built in 1567, twelve years after the founding charter, and remains a physical link to more than four and a half centuries of continuous education on the same site.

One of the more remarkable historical footnotes is the school's connection to American education: the South End site is understood to have become the architectural and organisational model for Boston Latin School in Massachusetts, founded in 1635 and recognised as the first public school established in what would become the United States. The Lincolnshire town of Boston gave its name to the Massachusetts city, and the grammar school's influence appears to have travelled with it.

Boston Grammar School converted to academy status on 1 January 2013, becoming a converter academy rather than remaining under local authority control, though it retains its selective, grammar school character. The school maintains a set of four houses — Laughton, Muston, Gannock and Parry — named after historical figures connected to the school, and marks its heritage each year with Beast Mart, a half-day holiday commemorating the historical cattle markets once held in the school yard. The school's Latin motto, Floreat Bostona (“May Boston Flourish”), also titles the official school song, composed by former headmaster Dr G.E. Pattenden, who led the school between 1850 and 1887.

Boston Grammar School has been boys-only from Year 7 to Year 11 throughout its history, but girls are admitted into the Sixth Form alongside boys progressing from Year 11, making the school's post-16 provision co-educational while the main school remains single-sex. Notable alumni include Professor Sir Jonathan Van-Tam, the former Deputy Chief Medical Officer for England who became a familiar public figure during the COVID-19 pandemic, alongside film producer Barry Spikings and a range of other politicians, athletes and professionals.

What Test Do Boys Sit for Boston Grammar School 11+?

Boston Grammar School is a full member of the Lincolnshire Consortium of Grammar Schools — the group of selective schools across the county that share a single 11+ entrance test set and standardised by GL Assessment. This is important for families outside Lincolnshire to understand: Lincolnshire does not use the same test format as many other counties. There is no separate mathematics paper and no English comprehension or creative writing component. The entire test is built around two reasoning papers.

Paper 1 — Verbal Reasoning (VR): tests a boy's ability to work with language patterns, codes, sequences and logical relationships between words, through question types including analogies, letter and number codes, hidden words, compound words, and synonym and antonym matching. For 2026, this paper is scheduled for 11–12 September.

Paper 2 — Non-Verbal Reasoning with spatial awareness: tests the ability to spot rules and relationships in abstract shapes — series, matrices, analogies and figure classification — extended into three dimensions through cube folding, block counting, shape rotation, nets and fold-and-punch problems. For 2026, this paper is scheduled for 18–19 September.

All raw scores are age-standardised before being combined into a final qualifying score, adjusting for a boy's exact date of birth so that a summer-born boy is not disadvantaged relative to an autumn-born classmate. The two standardised scores are added together, and the qualifying threshold of 220 is set to identify roughly the most able 25% of pupils tested across the selective areas of Lincolnshire. As with all Lincolnshire consortium schools, reaching 220 is a necessary but not sufficient condition for admission — it is the school's own oversubscription criteria that then decide who is actually offered one of the 120 places when demand exceeds supply, which at Boston Grammar School it typically does, at a ratio of roughly 2.2 qualifying candidates per place.

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

For boys seeking September 2027 entry to Year 7 at Boston Grammar School, the following 2026 timetable applies across the Lincolnshire Consortium:

Registration is completed through Boston Grammar School's own admissions process, but 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 they sat and qualified in the 11+ test. Official registration and admissions arrangements are published on the Boston Grammar School admissions FAQs page. For the national context, see our 11+ exam dates 2025–2026 guide.

How Does the Oversubscription Criteria Work at Boston Grammar School?

With 120 Year 7 places and no defined catchment area, Boston Grammar School is regularly oversubscribed among qualifying boys. The school's admissions policy uses a shorter, distance-led set of priority categories compared with some neighbouring consortium schools, applied strictly in the following order to boys who have already achieved the 220 qualifying score:

1. Looked-after children and previously looked-after children who meet the required qualifying standard
2. Children registered for Pupil Premium — that is, children who have been eligible for Free School Meals at any point in the previous six years
3. Siblings with a brother or sister already attending Boston Grammar School
4. All remaining qualifying boys, ranked by straight-line distance from home to school

Distance, where it is the deciding factor, is calculated electronically by Lincolnshire County Council's admissions software as a straight-line measurement between the family home and the school. If two or more applications cannot be separated by distance for the final available place, the school conducts an independent lottery as the tie-break. Because there is no catchment area, boys living anywhere in Lincolnshire — or beyond — can apply to Boston Grammar School provided they qualify in the 11+ test. In practice, most successful applicants live in and around Boston itself, given how distance functions as the final tie-breaking criterion once looked-after status, Pupil Premium registration and sibling links have been exhausted.

Ofsted Rating and Academic Results at Boston Grammar School

Boston Grammar School holds a Good Ofsted rating, confirmed by an inspection carried out on 5 October 2021, with positive findings across quality of education, behaviour and attitudes, personal development, leadership and management, and Sixth Form provision. Academically, the school performs consistently above national averages for a selective school. In the most recent published results, 53.6% of pupils achieved grade 5 or above in English and maths GCSE, against a national average of 45.4%. The school's Attainment 8 score — the average points score across a pupil's best eight GCSE subjects — stood at 53.10, and its Progress 8 score, which measures how much progress pupils make relative to pupils with similar starting points nationally, was 0.00, indicating progress broadly in line with expectations for a highly selective intake. At A-Level, the average points score was 27.28.

The school employs 49 teachers and 8 teaching assistants, giving a pupil-to-teacher ratio of around 19:1. Around 69% of 2021 leavers progressed to higher education or training, above the roughly 60% national average for all schools. These figures, combined with the Good Ofsted rating, place Boston Grammar School among the solidly performing grammar schools in the Lincolnshire consortium, without matching the very top academic outcomes of some of the county's other selective schools — a useful point of comparison for families weighing Boston Grammar School against other Lincolnshire options such as Carre's Grammar School in Sleaford or Spalding Grammar School.

Sixth Form Entry at Boston Grammar School

Boston Grammar School's Sixth Form has a Published Admission Number of 70 and operates as a co-educational provision, admitting girls from Year 12 onward even though Years 7 to 11 remain a boys-only environment. Direct entry to the Sixth Form is not decided by the 11+ test used for Year 7 admission. Instead, applicants — whether progressing from Boston Grammar School's own Year 11 or joining from another school — typically need grades 5 to 9 in at least five GCSEs, with at least grade 6 required in the specific subjects a student wishes to study at A-Level, and at least grade 7 in Mathematics for maths-related A-Level courses. Boys who complete Year 11 at Boston Grammar School and meet these academic standards have priority transfer rights into the Sixth Form. The school notes that it cannot guarantee every preferred combination of A-Level subjects, given the practical constraints of timetabling across a Sixth Form of this size.

How Should My Child Prepare for the Boston Grammar School 11+?

Preparation for Boston Grammar School should focus squarely on the two subjects tested in the Lincolnshire GL Assessment: Verbal Reasoning and Non-Verbal Reasoning with spatial awareness. Neither subject forms part of the national curriculum, so boys need structured, progressive practice well before the September 2026 test dates.

Verbal Reasoning rewards both vocabulary knowledge and the ability to identify abstract patterns in language. The strongest foundation is wide reading — boys 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, boys should work through the full range of GL Assessment VR question types under timed conditions.

Non-Verbal Reasoning with spatial awareness is highly learnable but requires a different style of preparation. Many boys find it 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 boys improve substantially over a preparation period of several months.

Given the competition for places — roughly 2.2 qualifying candidates for every one of the 120 places, once the priority categories are applied — a personalised one-to-one approach is particularly valuable: it lets a tutor identify precisely which question types or skills a boy 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 GL Assessment and support families across Boston and the wider county, including through online tuition. For a wider view of how Boston Grammar School compares with other Lincolnshire consortium schools, see our Lincolnshire grammar schools guide and our Lincolnshire 11+ format guide, or explore our dedicated guides to Queen Elizabeth's Grammar School, Horncastle and our Lincolnshire 11+ hub.