📚 Why Independent Schools Appear in 14-16 School Performance Data | 学校绩效数据里为什么会有独立学校 14 至 16 岁阶段的数据
Every year, when the Department for Education (DfE) publishes its key stage 4 performance data, the spreadsheets contain a group of schools that many students do not expect to see: fee-paying independent schools. The puzzle is reasonable. Independent schools are not maintained by local authorities, they are not required to complete the statutory school census, and they are not subject to the same accountability regime as state-funded schools. So why do their GCSE results turn up in the same tables, under the same column headings, as the local comprehensive down the road? The short answer is that performance data is built around qualifications and pupils, not around school types – and the 14-16 phase is defined by age and key stage, not by who pays the bills. The longer answer involves two separate data pipelines, a specific legal framework, and a set of deliberate statistical choices that are worth understanding properly.
每年英国教育部（DfE）公布 key stage 4（第四学段）绩效数据时，表格里总会出现一群让很多学生意外的学校：收费的独立学校（independent schools，即通常所说的私立学校）。这个疑问很合理：独立学校不由地方教育局维持，不需要填报法定的学校普查（school census），也不受与公立学校相同的问责制度约束。那么，为什么它们的 GCSE 成绩会和附近的公立综合中学出现在同一张表格、同一列标题之下？简短的回答是：绩效数据是以”资格证书”和”学生”为单位搭建的，而不是以”学校类型”为单位；而 14 至 16 岁阶段是由年龄和学段定义的，不是由”谁付钱”定义的。更完整的回答涉及两条完全不同的数据管道、一套具体的法律框架，以及一组值得仔细理解的有意为之的统计选择。
1. What “the 14-16 Phase” Actually Means in the Data | “14 至 16 岁阶段”在数据中到底指什么
In England, the 14-16 phase is formally known as Key Stage 4. It covers pupils in Years 10 and 11, normally aged 14 to 16, and it ends with a set of national qualifications – overwhelmingly GCSEs, plus a smaller number of level 1 and level 2 vocational and technical qualifications, and in some schools the International Baccalaureate Middle Years Programme or other non-GCSE routes. When DfE statisticians talk about “key stage 4 performance data”, they mean data about the qualifications achieved by pupils at the end of that phase, wherever those pupils were taught.
在英格兰，14 至 16 岁阶段正式称为 Key Stage 4（第四学段），涵盖 10 年级和 11 年级、通常 14 至 16 岁的学生，并以一套全国性资格证书作为终点——绝大多数是 GCSE，另有少量一级（level 1）和二级（level 2）职业与技术资格证书，部分学校还采用国际文凭中学项目（IB MYP）或其他非 GCSE 路径。当教育部的统计人员谈到”第四学段绩效数据”时，他们指的是学生在该阶段结束时取得的资格证书数据，无论这些学生在哪儿接受教育。
The critical consequence is this: the phase is an age-and-stage concept, not an institutional one. Any registered school or college that has pupils of that age taking those qualifications generates data that belongs to the national picture. That is why the same tables include state comprehensives, grammar schools, academies, free schools, university technical colleges, studio schools, further education colleges with 14-16 provision, alternative provision, hospital schools – and independent schools.
关键结论是：这个”阶段”是年龄与学段概念，不是机构概念。任何注册学校或学院，只要有这个年龄段的学生参加这些资格证书考试，就会产生属于全国整体图景的数据。正因如此，同一张表格里会同时出现公立综合中学、文法学校、academy、free school、大学技术学院（UTC）、studio school、设有 14-16 岁课程的继续教育学院、替代性教育机构（AP）、医院学校——以及独立学校。
2. Who Counts as an “Independent School” in the Data | 数据中”独立学校”包括哪些
For statistical purposes, an independent school in England is a school that is not maintained by a local authority and is not an academy or free school. It must be registered with the DfE under the registration regime for independent schools, and it is inspected either by Ofsted or by an approved independent inspectorate such as the Independent Schools Inspectorate (ISI). There are roughly 2,400 registered independent schools in England, ranging from tiny pre-prep and prep schools to large boarding schools with more than a thousand pupils.
就统计口径而言，英格兰的独立学校是指不由地方教育局维持、也不属于 academy 或 free school 的学校。它必须按照独立学校注册制度在教育部登记，并接受 Ofsted 或经批准的独立督察机构（如独立学校督察局 ISI）的检查。英格兰大约有 2,400 所注册独立学校，规模从极小的学前预备学校、预备学校，到在校生超过千人的大型寄宿学校不等。
Not all of them have a 14-16 phase. Pre-prep and prep schools typically finish at age 11 or 13, so they generate no key stage 4 data at all. Independent senior schools, through schools (3-18 or 4-18), and sixth form colleges in the independent sector do have a 14-16 phase and therefore do appear. The Independent Schools Council’s annual census typically covers around 1,400 member schools with roughly 550,000 pupils, which is about 7% of all school pupils in England – a small but far from negligible share of the national cohort.
并非所有独立学校都有 14 至 16 岁阶段。学前预备学校和预备学校通常在 11 岁或 13 岁结束，完全不会产生第四学段数据。独立高中、一贯制学校（3-18 岁或 4-18 岁）以及独立进修学院（sixth form college）确实设有 14 至 16 岁阶段，因而会出现在数据中。独立学校委员会（ISC）的年度普查通常覆盖约 1,400 所成员学校、约 55 万名学生，约占英格兰全部中小学生人数的 7%——比例不大，但在全国同龄人口中绝非可以忽略。
3. The Unit of Measurement Is a Qualification, Not a School Type | 统计单位是资格证书，而不是学校类型
Here is the single most important technical fact in this whole topic. The raw material of key stage 4 performance data is not “schools”; it is qualification results. Every entry for an approved qualification is recorded against a candidate number, and every candidate is attached to an examination centre identified by a centre number. Schools and colleges of every type – state, independent, FE, even some overseas centres – hold centre numbers and enter candidates.
这是整个话题中最重要的一条技术事实：第四学段绩效数据的原始素材不是”学校”，而是资格证书成绩。每一个获批准资格证书的报考记录都对应一个考生号，每个考生又归属于一个以中心号（centre number）标识的考试中心。各类学校与学院——公立、独立、继续教育，甚至部分海外考点——都拥有中心号并可以报考。
Once results are expressed as candidate-level records, the school’s legal status becomes a label attached to the record, not a filter that determines whether the record exists. DfE can therefore compute national figures – grade distributions, average attainment, subject entry patterns – across the whole cohort, and can then disaggregate by school type if it wishes. Excluding independent schools would not be a neutral omission; it would change the national totals.
一旦成绩以”考生层面记录”的形式呈现，学校的法律地位就只是附加在记录上的一个标签，而不是决定该记录是否存在的筛选条件。因此，教育部可以跨全体同龄人口计算全国性数字——成绩分布、平均学业表现、科目报考结构——再根据需要使用”学校类型”这一维度进行拆分。剔除独立学校并非中性的省略，而会改变全国总量。
4. How the Data Actually Arrives: Two Different Pipelines | 数据如何流入：两条不同的管道
Understanding why independent schools appear requires understanding that two distinct data streams feed the same publication. The first stream is administrative data collected from schools themselves, chiefly the statutory school census, which supplies pupil characteristics, prior attainment and absence information. The second stream is examination results data, which originates with the awarding organisations – the exam boards – and reaches DfE through data-sharing arrangements with the boards, JCQ and Ofqual.
要理解独立学校为何出现，必须明白同一份出版物由两条不同的数据流汇入。第一条是直接从学校收集的行政数据，主要是法定的学校普查，提供学生特征、先前学业水平和缺勤信息。第二条是考试成绩数据，其源头是颁证机构（即考试局），通过与各考试局、JCQ 及 Ofqual 的数据共享安排到达教育部。
| Feature | 项目 | Statutory school census | 法定学校普查 | Awarding organisation results | 颁证机构成绩 |
| Applies to independent schools? | 是否适用于独立学校？ | No – not part of the statutory return | 否——不属于法定申报范围 | Yes – results exist for every entered candidate | 是——每位报考考生都有成绩 |
| What it provides | 提供什么 | Pupil characteristics, FSM, SEN, prior attainment, absence | 学生特征、免费校餐、特殊教育需求、先前学业水平、缺勤 | Grades, subjects, qualification types | 成绩、科目、资格证书类型 |
| Entered into national data? | 是否进入全国数据？ | State-funded schools only | 仅公立资助学校 | All recognised centres, including independent schools | 所有被认可的中心，包括独立学校 |
This split explains the otherwise baffling pattern: independent schools have results data but often lack the contextual data needed for certain measures. The qualification record travels with the candidate; the pupil characteristic record does not.
这一分叉解释了那个本来令人困惑的现象：独立学校有成绩数据，却往往缺少某些指标所需的背景数据。资格证书记录会跟着考生走，学生特征记录却不会。
5. Why Independent Schools Are Absent From the Census but Present in Results | 为什么独立学校不在普查里，却在成绩数据里
The school census is a statutory return required of state-funded schools – maintained schools, academies and free schools. It is the backbone of most pupil-level analysis in England because it links each pupil to characteristics such as free school meal eligibility, special educational needs, ethnicity, first language and key stage 2 test results. Independent schools are not required to make this return, and most do not.
学校普查是对公立资助学校（地方维持学校、academy 和 free school）提出的法定申报要求。它是英格兰大多数学生层面分析的主干，因为它把每位学生与免费校餐资格、特殊教育需求、族裔、第一语言以及第二学段测验成绩等特征关联起来。独立学校无需进行这一申报，绝大多数也不申报。
What independent schools cannot avoid is that their pupils sit examinations. When a pupil at an independent school is entered for a GCSE at a centre, the awarding organisation holds a result. That result is part of the national results dataset that Ofqual and the boards maintain for awarding, standards monitoring and statistical purposes, and DfE receives it as part of the key stage 4 performance collection. No census return is needed for the result to exist.
独立学校无法回避的是：他们的学生要参加考试。当独立学校的学生在某个中心报考 GCSE 时，颁证机构就持有一份成绩。这份成绩属于 Ofqual 与各考试局为颁证、标准监测和统计目的而维护的全国成绩数据集的一部分，教育部则通过第四学段绩效数据采集程序获得它。成绩的存在并不需要普查申报。
There is one further nuance worth flagging. Since the mid-2020s the DfE has been extending its data collection from the independent sector for specific purposes, for example analysis connected to the removal of charitable business rates relief and the application of VAT to private school fees from January 2025, alongside long-standing independent sector pupil number collections. Students should check the current year’s guidance, because the boundaries of what is collected from independent schools are moving.
还有一个值得注意的细节。自 2020 年代中期起，教育部一直在为特定目的扩大对独立部门的数据采集，例如与取消慈善商业税率减免、以及自 2025 年 1 月起对私校学费征收增值税相关的分析，此外还有长期存在的独立部门学生人数统计。学生应查阅当年的最新指引，因为”向独立学校采集哪些数据”的边界正在移动。
6. What Is Published – and What Is Not | 哪些指标被公布，哪些没有
Because the two pipelines are uneven, the published measures for independent schools are uneven too. Attainment-based measures generally can be calculated; progress-based and context-based measures generally cannot. The table below summarises the typical position.
由于两条管道并不均衡，独立学校被公布的指标也不均衡。基于”结果水平”的指标通常可以计算；基于”进步幅度”和”背景背景”的指标通常无法计算。下表总结了一般情况。
| Measure | 指标 | Usually published for independent schools? | 通常对独立学校公布吗？ | Why | 原因 |
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