Set within a 14th-century manor house on 25 acres of Buckinghamshire countryside, Thornton College combines the grandeur of its setting with a forward-looking education for girls. While it remains a convent school founded by the Sisters of Jesus and Mary in 1917, the atmosphere is modern and inclusive. The school is one of the few independent boarding schools for girls in the area, offering continuity from nursery through to sixth form. It stands out locally for its award-winning focus on STEAM (Science, Technology, Engineering, Art, and Mathematics) and a pastoral approach that feels genuinely familial.
The drive up to the main building creates an immediate impression of history, yet the daily rhythm is lively rather than hushed. Dr Louise Shaw, who took up the Headship in 2022, leads with a focus on holistic development and kindness. The ethos is explicitly Catholic, but the intake is diverse; families of all faiths and none choose the school for its values rather than doctrine.
The site is a blend of the ancient and the practical. The original manor house hosts the library and boarding accommodation, while purpose-built wings house the science labs and the expressive arts studio. There is a tangible sense of community here. With a capacity of around 580 students, it is large enough to offer breadth but small enough that every girl is known. The school motto, Amor ac Labor (Love and Work), appears to be lived out in the industrious but supportive classroom culture.
Academic performance at GCSE is a clear highlight. In the most recent data, the school achieved an Attainment 8 score of 58.1, placing it significantly above the England average of 45.9. The school ranks 3rd locally for GCSE outcomes (FindMySchool ranking) and sits in the top 20% of schools in England for this phase. This reflects solid teaching and a curriculum that supports students to achieve well across the core subjects.
At Sixth Form, the picture in the reported data is mixed. While the school offers a broad range of subjects, the most recent A-level metrics show 26.8% of grades at A*-B, which is below the England average of 47.2%. The school ranks in the national lower band for this specific cohort. However, it is worth noting that cohort sizes can be small (21 students in the reported year), which can make statistical comparisons volatile. Parents should look at the three-year trend and value-added data when visiting, as the school often highlights individual successes that raw numbers may miss.
England ranks and key metrics (where available)
A-Level A*-B
26.83%
% of students achieving grades A*-B
GCSE 9–7
—
% of students achieving grades 9-7
The curriculum is broad, but the jewel in the crown is the STEAM provision. Thornton has been recognised nationally by the Independent Schools Association (ISA) for excellence in this area. Science is taught as separate disciplines from Year 7, and the integration of arts into STEM subjects encourages creative problem-solving.
Class sizes are kept small, typically around 15 to 18 in the senior school, dropping significantly for A-level and GCSE options. The approach is nurturing; teachers focus heavily on building confidence. Support for Special Educational Needs (SEND) is well-regarded, with a dedicated learning support department that works closely with class teachers to implement individual learning plans.
Destinations are varied, reflecting the diverse abilities and interests of the girls. In the 2024 cohort, 71% of leavers progressed to university, while others pursued further education or apprenticeships. The school has a dedicated careers programme that begins early, helping girls identify pathways that suit them, whether that be a creative arts foundation, a traditional university degree, or a vocational route.
Total Offers
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Oxford
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Thornton College is non-selective academically at the main entry points, though assessments are used to ensure the school can meet a child's needs. The main intake is into Reception, Year 7, and Year 9, with Year 12 entry dependent on GCSE grades (typically requiring 5 passes at grade 4 or above, with grade 6 in subjects to be studied at A-level).
For Year 7 entry, girls sit an entrance assessment in the January prior to September entry. This includes papers in Mathematics, English, and Non-Verbal Reasoning. The process is designed to be low-stress, often incorporating taster activities. The school is popular, so early registration is recommended.
The pastoral system is the spine of the school. In the 2022 ISI inspection, the quality of pupils' personal development was rated 'Excellent'. The House system (Cavell, Hillary, Keller, and Kingsley) provides vertical integration, meaning Year 7s mix with Sixth Formers for charity events and competitions.
Mental health support is structured and accessible. There is a school counsellor available, and the 'Girls on Board' approach is used to help students navigate friendship dynamics and conflict resolution independently. The Catholic framework provides a layer of spiritual support, with the Chaplaincy team offering a listening ear to students regardless of their religious background.
The extracurricular list is extensive, utilising the 25-acre grounds effectively. Pillars include:
The choir is a major feature, often touring internationally and performing at local festivals. Drama productions are inclusive, ranging from nativity plays in the prep school to full-scale senior musicals.
Facilities include tennis courts, a swimming pool, and sports pitches. While not a specialist sports college, teams compete regularly in netball, hockey, and athletics.
The Eco-Warriors club is highly active, managing the school's green initiatives. Robotics and coding clubs support the STEAM curriculum.
The school also runs the Duke of Edinburgh’s Award and participates in the Tycoon Enterprise competition, where students have enjoyed national success.
Boarding is available from Year 3 upwards and is located in the main manor house. The upstairs dormitories have been modernised but retain characterful features like window seats and original fireplaces. Options include full, weekly, and flexi-boarding. The flexi option is particularly popular with local families needing occasional support. The boarding community is diverse, with international students adding a global dimension to the otherwise local feel. Weekends for full boarders include trips to Oxford, London, and local leisure attractions.
Day fees for the 2024-2025 academic year are £6,645 per term (£19,935 annually) for Senior pupils. Boarding fees are £9,865 per term for weekly boarders and £11,700 per term for full boarders. This pricing places Thornton in a competitive position compared to other independent schools in the Home Counties.
Bursaries are available for families who require financial assistance, subject to means-testing and annual review. Scholarships are awarded for academic excellence, art, drama, music, and sport, typically offering a reduction in fees and a programme of enrichment.
The school day runs from 8:30am to 4:00pm. Wraparound care is extensive; breakfast club starts at 7:30am, and after-school care runs until 6:00pm, which is a significant draw for working parents. An extensive network of school buses covers Milton Keynes, Buckingham, and surrounding villages.
Thornton College offers a nurturing, value-led education in a stunning setting. It is not an academic hothouse but a school that excels at building confidence and character, evidenced by its strong GCSE value-added and excellent pastoral care. Best suited to girls who will thrive in a supportive, smaller community that champions STEAM and creativity equally. The main challenge for ambitious families may be reconciling the lower headline A-level figures with the obvious holistic quality of the education.
Yes. The 2022 ISI inspection rated the school 'Excellent' for pupils' personal development and academic achievement. GCSE results are strong, ranking in the top 20% of schools in England.
For the 2024-25 academic year, senior day fees are £6,645 per term. Full boarding is £11,700 per term. Nursery and Prep fees are lower; please check the school website for specific year-group pricing.
No, it is broadly non-selective. While there are entrance assessments for Year 7 to identify learning needs, the school prides itself on accepting a wide range of abilities and adding value through supportive teaching.
Yes, the school operates a comprehensive bus service covering Milton Keynes, Woburn, Buckingham, Brackley, and surrounding villages.
Yes, it is a Catholic school founded by the Sisters of Jesus and Mary. However, it welcomes students of all faiths and none, focusing on shared Christian values rather than dogmatic instruction.
Thornton College is a girls' school from Reception through to Year 13. The Nursery (ages 3-4) is co-educational.
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