The disadvantage attainment gap accumulates over time
Disadvantaged children are already 4.6 months behind their peers by the end of the Early Years Foundation Stage. The gap widens through primary and secondary school, and by 16 – 19 education, much of the gap reflects differences that have emerged earlier in the system.

Prior attainment is a major driver
Earlier attainment explains a substantial share of the later attainment gap. Prior attainment at age five accounts for 40% of the gap at key stage 2, 44% of the key stage 4 gap, and nearly two‑thirds (63%) of the 16 – 19 gap once GCSE attainment is included. This suggests that the gap at 16 – 19 largely reflects disadvantages that emerge much earlier in schooling.

Attainment in maths and English appear to be especially important in explaining these gaps. However, it’s difficult to isolate the exact contribution of any single subject, as students who perform well in one subject tend to do well in others.

Disrupted schooling matters
Absence is one of the most important factors associated with the disadvantage gap, especially in primary and secondary school. It accounts for 21% of the gap at key stage 2, rising to 34% by the end of key stage 4.

Moderate absenceYou can assign a term to a certain definition. We provide extra options to extend upon the glossary creation. is associated with lower GCSE attainment equivalent to 5.5 months, compared with similar pupils whose absence is below the national average. This attainment penalty grows to 9.6 months among persistently absent pupils and to 20.9 months for severely absent pupils.

SEND also shapes attainment outcomes
Identified SEND is a particularly important contributor to the gap in the early years, partly reflecting limited data on early childhood environments, and remains significant at later stages. However, its role diminishes by key stage 4 and 16 – 19, operating mainly through its earlier influence on attainment.

With early SEND identification and sustained support, attainment outcomes for children with SEND are similar to those of peers with comparable prior attainment across all education phases.

Cohort and institution characteristics grow in importance with age
Differences in student’s individual characteristics explain a larger share of the attainment gap than differences in the schools and cohorts they belong to. However, the influence of student’s cohort and institution level factors increases as children and young people move through the education system.

This does not imply that school-level characteristics such as institution type or proportion of pupils that are absent are not important contributors to the gap. Instead, it suggests that schools influence outcomes both through their contribution to students’ individual characteristics and through additional school-level factors that affect attainment.

Differences in outcomes by ethnicity are observed at every stage
This is driven partly by consistently lower progress among disadvantaged White British pupils, a pattern that persists across the education system.