Closing language gaps with a tested method

NELI is low-cost programme that narrows the language gap between poorer children and their peers before it's too late

A 20-week programme in which trained teaching assistants run short, structured talking-and-listening sessions with children who start school with the weakest spoken language. It is cheap and delivered by staff schools already have. It is also one of the most rigorously proven interventions in the world, tested across nearly two decades of randomised trials, and after the pandemic it was rolled out to more than 6,500 schools in England.

THE PLACE
England and rest of UK

THE INVESTMENT
A structured programme with precise targeting

THE WIN
+3 to 4 months of language progress; +7 months for disadvantaged pupils

THE PROBLEM

Children arrive at school with wildly different amounts of language. A four-year-old from a language-rich home may know thousands more words than a classmate from a disadvantaged one, and that early gap is a strong predictor of later reading, exam results and life chances.

Left alone, it widens. Yet spoken language, unlike much of what schools worry about, is highly teachable in the early years, and reception, age 4 to 5, is the moment to do it, before children are expected to read and write on a foundation many do not have.

TAKING ACTION

Nuffield Early Language Intervention (NELI) grew out of two decades of research by Nuffield-funded academics at the University of Oxford, into how children's language develops and why some fall behind.

Rather than a vague call for more talk, they built a precise, structured programme. A short app-based screen identifies the three to six children in each reception class with the weakest oral language.

A teaching assistant, given only two half-days of training and detailed lesson plans, then runs small-group and individual sessions three times a week for 20 weeks, building vocabulary, listening, storytelling and, later, the sound knowledge that underpins reading. The design is deliberately deliverable by ordinary school staff, at scale.

INVESTMENT SUCCESS!

Across trials run by the Education Endowment Foundation and independent evaluators, children who received NELI made roughly three to four additional months of progress in oral language compared with similar children who did not, and the gains held six months after the programme ended.

In the post-pandemic national scale-up, evaluated across thousands of schools, children again made about four additional months of progress, and pupils eligible for free school meals gained up to seven months.

KEY WINS

+3 to 4 months of additional oral language progress

+7 months for the most disadvantaged (free-school-meal pupils)

6,500+ schools reached in England after COVID

WHY INVESTMENT WORKED

Precise targeting

A quick, objective screen finds the specific children who need it, so scarce time goes where it counts.

Delivered by existing staff

Teaching assistants, not specialists, run it after minimal training, which is what makes it affordable and scalable.

A tight, scripted design

Detailed plans and short structured sessions mean the programme works even when delivered by non-experts.

Built and proven over 20 years

Repeated randomised trials refined it from a promising idea into national-scale evidence.

Biggest gains for the most disadvantaged

Children on free school meals gained up to seven months, so it narrows rather than widens the gap.

Evidence before scale

It was trialled for efficacy, effectiveness and national scale before being rolled out to thousands of schools.

SCALE AND SPREAD

NELI was already an EEF promising programme when COVID-19 hit. With reception children losing months of early interaction during lockdowns, the UK Department for Education funded a national rollout as part of its education recovery response, reaching more than 6,500 schools, one of the largest evidence-based scale-ups in English education.

The programme is published by Oxford University Press and delivered through OxEd and Assessment, a University of Oxford spin-out, with training partners. It continues to be offered to schools, and a preschool version has since been trialed.

PARTNERS AND PHILANTHROPY

NELI is a rare case of a philanthropically-funded research programme becoming government-funded national infrastructure.

The underlying science was funded by the Nuffield Foundation over many years; the Education Endowment Foundation, itself endowed with UK government and philanthropic money, funded the trials that proved it; and the Department for Education paid for the national rollout.

Philanthropy funded the patient research and evidence, and government funded the scale.