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Book a Free ConsultationIf you live in or near Croydon and you're beginning to think about selective secondary schools, you're navigating one of the most varied and demanding 11+ landscapes in South London. Within a short distance of each other sit three of London's most prestigious independent schools — Whitgift, Trinity, and Old Palace of John Whitgift — alongside the highly competitive Sutton grammar school consortium. Each route into these schools involves different exams, different timelines, and different preparation demands. Getting this right requires more than buying a practice book in Year 5; it requires understanding exactly what each school is looking for and building the skills your child needs well in advance.
Croydon itself does not have state grammar schools, but families in the borough have two main selective pathways to consider. The first is the group of independent schools in and around Croydon: Whitgift School (boys), Trinity School (boys), and Old Palace of John Whitgift School (girls). These three schools are consistently ranked among the top independent schools in London and nationally, with strong academic results and significant co-curricular reputations. Entry is genuinely competitive and the process begins earlier than many parents expect.
The second pathway is the Sutton Selective Eligibility Test (SET), which gives access to the four state grammar schools in the neighbouring London Borough of Sutton: Nonsuch High School for Girls, Wallington High School for Girls, Wilson's School, and Wallington County Grammar School. Croydon families are well placed geographically to apply to these schools, and many do — but so do families from across South London and Surrey, making competition fierce.
For Whitgift and Trinity, the process typically begins with the ISEB Common Pre-Test, sat in Year 6 (usually in the autumn term, around October or November). This is an adaptive, computer-based test covering verbal reasoning, non-verbal reasoning, mathematics, and English reading. It is used as an initial sift, and children who perform well are then invited to sit school-specific papers. These second-stage papers vary by school but generally include mathematics and English, and are more demanding in both content and time pressure than the pre-test alone. Whitgift and Trinity also consider school reports and, in some cases, interviews.
Old Palace of John Whitgift follows a similar independent school admissions process, with its own entrance assessments in English and mathematics, designed to identify girls with strong academic potential across a range of abilities.
For the Sutton SET, children sit a single standardised test produced by GL Assessment, typically in September of Year 6. The test covers English (including comprehension and grammar) and mathematics, with a separate verbal reasoning component. Results are used to determine eligibility across all four Sutton grammar schools, and families then make separate applications to individual schools through the normal admissions process. The test is not adaptive — it is a fixed-format paper sat under timed conditions, and speed as well as accuracy matters.
The Sutton grammar schools are among the most oversubscribed in England. Wilson's School, for example, regularly receives well over 2,000 applications for around 180 places. Nonsuch and Wallington High attract similarly large numbers of girls. Achieving the eligibility threshold in the SET is only the first step — a child must then score highly enough to be ranked within the admissions criteria for their chosen school.
At Whitgift and Trinity, the combination of pre-test performance, school-specific paper results, and school reference means that preparation needs to be thorough across all components. Both schools attract applicants from prep schools with dedicated 11+ programmes, which means state-school children in particular benefit from structured, specialist support to compete on equal terms.
Key facts families in Croydon should hold in mind:
Because the Sutton SET falls in September of Year 6, serious preparation needs to begin no later than the start of Year 5 — and ideally earlier for children who need to build foundational skills in mathematics or reading comprehension. This is not about drilling past papers from age nine; it is about ensuring your child has secure knowledge of the Year 5 and Year 6 curriculum, strong reading habits, and familiarity with the reasoning question types before timed practice begins.
From around January of Year 5, it is worth introducing verbal and non-verbal reasoning systematically. Many children find the specific question formats in GL Assessment papers — such as letter series, coded sequences, and analogies — unfamiliar at first. Regular, structured exposure over several months is far more effective than intensive cramming in the summer before the exam.
For the ISEB pre-test, the adaptive format means that children who hesitate or make early errors can find the test adjusts downward quickly. One concrete preparation strategy is to practise under genuine timed conditions from an early stage, so that your child develops the habit of moving through questions at pace without becoming stuck. Sitting full-length mock tests — not just individual question sets — builds the stamina and pacing skills the pre-test demands.
For the school-specific papers at Whitgift and Trinity, mathematics preparation should extend beyond the standard curriculum to include problem-solving, multi-step reasoning, and unfamiliar question formats. English papers often include extended writing tasks that reward children who can structure an argument or narrative clearly under pressure.
Leading Tuition provides 1-to-1 specialist tutoring for children preparing for the full range of Croydon and Sutton selective school exams — including the ISEB pre-test, school-specific papers for Whitgift, Trinity, and Old Palace, and the GL Assessment Sutton SET. Every child's programme is built around their individual starting point: their current strengths, the specific schools they are targeting, and the time available before their exams.
Our tutors are experienced with the particular demands of each exam format. For the SET, that means systematic verbal reasoning preparation and timed mathematics practice. For the independent school route, it means developing the extended writing, problem-solving, and reasoning skills that the second-stage papers require. We work with families from Year 4 onwards, and we are honest about what realistic preparation looks like for each child.
Does Croydon have its own state grammar schools?
No. Croydon does not have state grammar schools within the borough. Families seeking grammar school entry typically apply to the four Sutton grammar schools — Nonsuch, Wallington High, Wilson's, and Wallington County — which are accessible to Croydon residents and use the GL Assessment Sutton SET as their entrance exam.
When should my child start preparing for the Sutton SET?
Because the SET is sat in September of Year 6, preparation should begin in earnest during Year 5. Children who need to build reasoning skills or close gaps in mathematics and English will benefit from starting earlier. Leaving preparation until the summer before the exam gives very little time to develop the skills the test requires.
What is the difference between the ISEB pre-test and the Sutton SET?
The ISEB pre-test is a computer-based, adaptive assessment used by Whitgift and Trinity as an initial sift. It covers verbal reasoning, non-verbal reasoning, mathematics, and English. The Sutton SET is a fixed-format, paper-based GL Assessment test covering English, mathematics, and verbal reasoning, sat in September of Year 6. Children applying to both independent schools and Sutton grammars will need to prepare for both formats.
Can a child at a state primary school compete with prep school applicants for places at Whitgift or Trinity?
Yes — but it requires structured, specialist preparation. Many prep schools provide dedicated 11+ coaching as part of their curriculum, which means state-school children benefit from working with an experienced tutor who understands the specific demands of the ISEB pre-test and the school-specific papers. With the right preparation and sufficient time, state-school children regularly win places at both schools.
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Book a free consultation and we’ll help you find the right support for your child.
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