How to Evaluate a Private School: What Open Days Do Not Tell You
Schools put their best foot forward on open days. The questions that matter — staff turnover, how the school handles students who struggle, what happens at the bottom of the ability range — are not in the prospectus. Here is how to find them.
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By Richard J. · Updated 28 June 2026
A family committing to a UK boarding school for a child from age 13 to 18 is spending approximately £300,000–£390,000 at current fee levels — figures that have risen sharply since VAT was applied to fees, as our breakdown of UK private school fees in 2026 sets out. Most families make this decision based on a 90-minute open day, a glossy prospectus, league table position, and word of mouth. For a commitment of this size, this is an extraordinary amount of information asymmetry. The school knows far more about its own performance, culture, and challenges than any prospective parent. Closing that gap requires knowing specifically what to look for and where to look before you commit.
Before you visit: the research that most parents skip
Read the ISI or Ofsted inspection report
UK independent schools are inspected by the Independent Schools Inspectorate (ISI) or in some cases Ofsted. ISI inspection reports are published on the ISI website and cover academic achievement, personal development, pupils' welfare, and governance. Unlike an open day presentation, the inspection report reflects what inspectors found when they were in the school unannounced. Look specifically at the pastoral care and welfare sections — these reveal how the school handles the less marketable dimensions of educating adolescents. A school with consistently strong academics but a "requires improvement" welfare assessment is telling you something important.
Look at the value-added data, not just the raw results
League tables rank schools by A*/A and A*–B percentages at A-level and IB averages. These measure absolute performance. What they do not measure is how much the school contributed to that performance versus how selective its intake was. A school admitting only students with very high GCSE scores and achieving 95% A*/A at A-level may be doing less for its students than a school admitting a broader range and achieving 78% A*/A. The Department for Education publishes value-added data for independent schools. The ISI report includes discussion of achievement relative to expectation. Ask the school directly: "What is your average GCSE entry profile for students entering the sixth form, and how does your A-level performance compare to similar schools by intake?" If you are still weighing curricula, our IB versus A-levels comparison covers how the two routes actually differ for university outcomes.
Check the staff turnover
Schools do not advertise staff turnover. The Good Schools Guide sometimes comments on it. The best proxy is checking the school's website teacher staff listing against what it showed two or three years ago via the Wayback Machine (web.archive.org). High turnover in specific departments — or across the school — suggests either poor management, a difficult culture, or financial instability leading to below-market salaries. Continuity of teaching, particularly in sixth form where students build relationships with teachers who write university references, matters materially.
The fifteen questions to ask on any visit
1 What happens when a student is not achieving expected progress?
The answer reveals the learning support infrastructure. A good school describes specific interventions, regular monitoring, how parents are contacted, and what the process looks like. A school that responds with vague reassurance ("we keep a close eye on all students") has not thought about this carefully enough.
2 What is your typical offer range to Oxbridge applicants, and what percentage applied?
The percentage who applied tells you whether the school actively prepares students for Oxbridge or whether the occasional high achiever self-selects. The offer rate — not the application rate — tells you how well the school's preparation actually works. Schools that say "we send lots of students to Oxbridge" without specifying the underlying numbers are being imprecise in a way that warrants follow-up.
3 How has your IB average (or A-level A*/A rate) changed over the last five years?
Schools should know this. A school whose results have improved is doing something right. A school whose results have declined will be evasive about this question — which is itself informative. The trajectory matters as much as the current position.
4 What is the typical class size in sixth form?
Most schools advertise small class sizes as a selling point but are vaguer about sixth form specifically, where class sizes can rise as subjects consolidate. A chemistry A-level with four students gets a very different experience from one with eighteen. Ask specifically about the subject your child intends to study.
5 How do you handle mental health concerns among students?
The boarding school environment creates specific mental health pressures — separation from family, intense peer competition, identity formation in a constrained environment. The school's honest answer to this question tells you about pastoral care depth. Look for: named staff, a clear referral process to external professionals when needed, and a culture of proactive identification rather than reactive response.
6 What percentage of your teaching staff have been here for more than five years?
Stability matters. In boarding schools specifically, houseparents and core academic staff who have long tenure know students deeply in ways that new arrivals cannot. A high turnover figure (if they tell you) or an unwillingness to answer this question is a flag.
7 How does the school support students who do not want to play team sports?
Most UK boarding schools have strong team sports cultures. For students who are not athletes — who thrive in individual activities, arts, music, drama, or outdoors rather than on a rugby pitch — the quality of life in a sport-dominated culture varies enormously. Ask specifically: "What options exist for a student who does not enjoy or is not good at team sports?"
The open day trap: Schools assign their most polished, enthusiastic staff and students to open day roles. The student ambassadors are not representative of the student body; they are selected for social confidence and articulacy. The teachers you meet have been briefed to present well. This is not dishonest — it is sensible marketing. It simply means that the information you gather on an open day is selected information. Weight it accordingly, and spend your visit asking the questions above rather than listening to the presentation.
8 What does a typical week look like for a boarding student in the lower sixth?
The specific answer — timetable detail, free time structure, when and how students can leave the campus, what happens on weekends — tells you about the actual daily experience rather than the marketed one.
9 How do you handle a student who is struggling socially?
Social difficulty in a boarding environment — isolation, exclusion, the specific dynamics of dormitory life — can be severe and invisible to parents. Ask how the school identifies it and what the intervention looks like. The pastoral care quality is often the most important and least discussed dimension of boarding school choice.
10 What subjects are you considering removing or reducing in the next three years?
Schools occasionally quietly reduce or remove subjects when staff leave or demand falls. If your child has a specific subject interest, ask directly whether it is stable and well-resourced.
11 What proportion of pupils receive learning support, and how is it delivered?
Every school will say it caters to a range of needs. The useful detail is how: in-class differentiation, a dedicated learning-support department, specialist staff for specific differences such as dyslexia or dyscalculia, and whether support carries an additional fee. A school that integrates support quietly into normal teaching differs materially from one that treats it as a bolt-on. If your child has an identified need, ask to speak to the head of learning support directly rather than relying on the admissions team's summary.
12 What are your scholarship and bursary arrangements, and what proportion of pupils hold them?
Scholarships recognise ability; bursaries address need. The proportion of pupils receiving means-tested support tells you something about the school's social composition and its financial health — a school funding meaningful bursaries from endowment is in a different position from one discounting fees to fill places. For families for whom the full fee is a stretch, ask whether scholarships carry a fee reduction or are honorary, and how bursaries are reassessed year to year.
13 Where do your leavers actually go — and how concentrated are the destinations?
A leaver destinations list is more revealing than a league table position. Look for breadth and fit rather than a handful of marquee names: a school sending students to strong courses matched to their interests is doing better than one funnelling everyone toward the same prestige targets. Ask specifically about destinations in your child's likely field, and about overseas universities if you are an international family considering US or European routes.
14 For international families, what guardianship and integration arrangements do you require?
UK boarding schools require overseas pupils to have a UK-based guardian, and the quality of guardianship arrangements varies enormously. Ask what the school requires, whether it works with specific guardianship organisations, and how it supports pupils during exeats and half-terms when boarding houses close. The practicalities of guardianship, visas, and term-time logistics are part of the relocation decision rather than an afterthought — our guide to the family relocation schooling decision covers how this interacts with a wider move.
15 If it is not working out, what does leaving look like?
No family wants to plan for failure, but the school's answer reveals its character. Ask about notice periods, fee liability on withdrawal, and — most importantly — whether the school supports a constructive exit with honest references and help finding an alternative, or whether departures are handled defensively. A school confident in its provision answers this question openly.
- How do your A-level or IB results compare to five years ago?
- What was your ISI inspection result, and are there any areas requiring improvement?
- What percentage of teaching staff have been here more than five years?
- How many students requested to leave in the last two years, and why?
- Has the school had any safeguarding concerns raised in the last three years?
Safeguarding: the question you must not skip
Of everything on this page, safeguarding is the dimension that matters most and is discussed least on an open day. Every UK school must follow the statutory guidance Keeping Children Safe in Education (KCSIE), maintain a single central record of staff vetting checks, and appoint a designated safeguarding lead. These are not optional, and a school's handling of them is the clearest signal of its underlying seriousness. Before you visit, read the safeguarding and welfare section of the ISI or Ofsted report in full rather than the headline grade — look for whether safeguarding was judged effective, whether any actions were required, and whether previous concerns were closed out.
On the visit, ask directly: who is the designated safeguarding lead, how are concerns raised by pupils, and what training do houseparents and boarding staff receive? A school that answers these questions precisely and without defensiveness is demonstrating the culture you want for your child. A school that treats the question as an imposition is telling you something equally useful. For boarding schools specifically, ask how the school manages the particular dimensions of residential life: supervision arrangements overnight, the boundary between pastoral closeness and appropriate professional distance, how a pupil can reach someone independent of their own house if they need to, and how the school handles allegations when they arise. The detailed, unhurried answer is reassuring precisely because it shows the school has thought hard about risks that prospectuses never mention — and it is the single most important thing a visit can establish.
Day, weekly, or full boarding — and the question of fit
The boarding model matters as much as the school. Full boarding suits families who are overseas, who travel for work, or whose child genuinely thrives in an immersive environment. Weekly boarding — pupils board Monday to Friday and return home at weekends — is an underrated middle option for families within reach of the school, preserving family rhythm while giving the child the structure and independence of boarding life. Day attendance keeps the child at home but can leave them peripheral to a school whose social and pastoral centre of gravity is the boarding house.
The decision should follow the child rather than the parent's preference. A sociable, independent 13-year-old may flourish in full boarding; a child who relies heavily on family routine may do better as a weekly boarder or day pupil for the first year, with the option to board more fully later. Ask how integrated day pupils are into house life, whether weekly boarders are treated as full members of the house or as visitors, and how the school manages the transition between models. The question of full boarding versus an international alternative closer to home is its own decision, which we examine in our comparison of UK boarding versus international schools. Whichever model you choose, ask whether it can change without changing schools: a child who starts as a day pupil and later wants to board, or a full boarder who needs to come home more often in a difficult term, is far better served by a school that can flex than by one that treats the original choice as fixed for five years.
Using an educational consultant
For families navigating the UK independent school market from abroad, or families with specific requirements — learning differences, high academic ability, particular pastoral needs — specialist educational consultants such as Gabbitas, Carfax, and the Good Schools Guide's consultant service provide expertise that pays for itself many times over. These consultants have current knowledge of school culture that no amount of research from outside can replicate, and they act in the family's interest rather than any school's.
The value is not in identifying which schools exist — that research is readily available. It is in knowing which schools currently have strong leadership versus schools going through leadership transitions, which have recently improved pastoral care versus those whose reputation rests on historical quality, and which fit specific child profiles that go beyond the league table ranking. For internationally mobile families, schooling is rarely a standalone decision: it sits inside a wider move, and the same consultants who advise on UK schools can be a useful bridge to international schools in Dubai, Singapore, and Geneva when the relocation calculus changes. Where the move is driven by tax or residency, our analysis of where UK non-doms are relocating shows how often schooling and jurisdiction are decided together.
Frequently asked questions
Where can I find ISI inspection reports for UK independent schools?
ISI inspection reports are published at isi.net — the Independent Schools Inspectorate website. Search by school name. Reports include the inspection date, overall outcome, and detailed sections on academic achievement, personal development, welfare and safeguarding, and governance. Schools inspected since 2019 use a new framework with different terminology — check which framework applies to the report you are reading.
Is the Good Schools Guide worth buying?
The Good Schools Guide provides independent editorial reviews written by education professionals who visit schools, speak to current students and parents, and form views that are not shaped by the school's marketing. For families evaluating schools, it provides a level of editorial independence that other sources do not offer. The online subscription provides access to a large number of school reviews and is generally considered worth the cost for a family actively shortlisting schools. The guide also offers a direct consultant service for families who want personalised advice.
How early should we start the boarding school registration process?
For entry at 13+ (Year 9), registration should typically begin three to four years before the intended entry date — at age 9 or 10. For entry at 11+ or 16+, timelines vary. Oversubscribed schools have waiting lists, and registration early does not guarantee a place but does ensure you are in the queue. The entrance exam for 13+ entry (Common Entrance or scholarship examinations) is sat at age 12–13 after a period of preparation, typically at a preparatory school. Begin the process well before the exam rather than in the exam year itself.
This article is for informational purposes only and does not constitute educational advice. School quality, staff, and inspection ratings change. Always verify current information directly with schools and from official inspection bodies. The questions suggested are illustrative rather than exhaustive, and the right questions for any family will depend on their specific child's profile and needs.