KS2 SATs maths results are shaped long before Year 6
SATs week is not where maths outcomes begin. They are largely shaped across Years 1 to 5, in every lesson, every week, as foundations are either secured or quietly left behind. This guide explains what the 2025 maths paper data suggests, why that matters for schools, and what leaders can do about it.
What the KS2 SATs maths data suggests
Each year, the papers are published and analysed. The 2025 maths papers point to the same broad conclusion: KS2 outcomes depend heavily on whether lower-KS2 foundations have truly been secured.
of questions in one published analysis of the 2025 KS2 maths papers drew on Year 6 curriculum content. The majority drew on content taught in Years 3, 4 and 5.
58 out of 110 was the 2025 maths raw score for the expected standard. That is just over half the available marks.
In a row that Fractions, Decimals and Percentages was identified as the area pupils struggled with most. The same foundational issue, repeating year after year.
The implication for schools is clear. KS2 maths papers test far more than final-year content alone. Strong Year 6 teaching matters, but the pupils most likely to succeed are those whose earlier foundations were properly secured. Revision can help with confidence, familiarity and test technique. It is much less effective at repairing gaps that have built up over several years.
Why gaps accumulate silently
Most primary maths programmes move at the pace of the calendar, not always at the pace of the pupil. When classes move on before every pupil has secured the previous step, some children carry that gap into the next unit, the next term and the next year.
The calendar moves on
Many schemes set out what to teach in week 8 of term 2 whether or not every pupil fully secured week 7. When that happens, small gaps can travel forward unnoticed until they become much harder to address.
Gaps compound invisibly
Ofsted’s 2023 maths subject report found that gaps in basic number facts “may not become apparent until a significant amount of time has elapsed.” By the time they show up clearly in Year 6, they are much harder to address.
Fluency is the missing piece
A pupil who cannot quickly recall key number facts uses working memory on basic calculation instead of on the reasoning task in front of them. That affects both arithmetic performance and access to more demanding questions.
Year 6 cramming has limits
Late preparation can support strategy, familiarity and confidence. It is far less likely to solve weaknesses in fluency and foundational understanding that have been developing over several years.
What Big Maths does differently from Year 1 onwards
SATs results are a long-game outcome. Big Maths is built for that long game.
Big Maths is designed to stop pupils moving forward with gaps behind them
The Baseline Assessment identifies where each pupil actually is. The weekly Beat That! cycle helps confirm whether each step has been securely learned before the next is introduced. Pupils move on because the evidence suggests they are ready, not simply because the term has moved on.
Fluency is built in every week, from the start
Learn Its builds systematic, sequenced instant recall of every key number fact from Early Years / P1 to Year 6 / Primary 7. It’s Nothing New connects new learning to what pupils already know. Both are non-negotiable parts of every Big Maths lesson. Not optional extras added in Year 6.
Teachers know where every pupil is, every week
The Learning Gaps tool updates automatically every Friday, so teachers start the next week with a clear picture of what each pupil is ready for next. Gaps can be identified while they are still small, rather than being discovered at the end of a unit or in Year 6. See how the Learning Gaps tool works.
Whole-school visibility from Early Years / P1 upwards
Headteachers and maths leads can see attainment and progress across every class and year group at any point in the year. Gaps that appear in Year 2 or Year 3 can be addressed before they compound. By the time pupils reach Year 6 / Primary 7, the foundations are in place.
What schools using Big Maths are achieving in KS2 maths
We do not ask schools to take our word for it. Every figure below names the school and cites a source you can check.
Rockmount Primary School, Croydon reached 90% at the expected standard in KS2 mathematics in 2025, against 74% nationally, with 44% at the higher standard against 27%. Its average scaled score was 108.4 against 104.8. Those outcomes follow 87% in 2024 and 88% in 2023.
The school was judged Outstanding in every category by Ofsted in June 2025, with mathematics selected as one of four deep-dive subjects.
“Pupils achieve exceptionally well. The curriculum is carefully thought out in a logical order.”
Ofsted inspection report, Rockmount Primary School, June 2025. Crown copyright, used under the Open Government Licence v3.0.
90% against 74% nationally
Expected standard in KS2 mathematics, 2025. Published Key Stage data for a named school.
44% at the higher standard
Against 27% nationally, at a school whose own published strategy named conversion to greater depth as its challenge.
Three years of strong attainment
88% in 2023, 87% in 2024, 90% in 2025. Sustained rather than a single good year.
England, Scotland and Wales
Big Maths meets curriculum requirements for all three nations. One programme, one subscription.
Questions every school should ask about KS2 SATs maths preparation
Not about what to do in the weeks before SATs. About what the programme is doing in Years 1 to 5.
Do we know where every pupil in every year group actually is right now?
Not what year group they are in. Not what unit the class is on. What has each individual pupil actually secured? A programme that cannot answer that question weekly is accumulating unknown gaps in every class, every term.
Are we moving pupils forward because the calendar says so, or because they are ready?
If the scheme of work moves to fractions in week 6 regardless of whether every pupil secured place value in week 5, gaps are inevitable. By Year 6 / Primary 7, those gaps have compounded through three or four years of calendar-driven teaching.
Is fluency being built systematically, or fitted in where possible?
The arithmetic paper tests instant recall of number facts. Pupils who lack automaticity in multiplication facts and number bonds cannot perform under timed conditions regardless of their conceptual understanding. Fluency built in Years 1 to 4 shows up on the SATs arithmetic paper in Year 6 / Primary 7.
What does our Year 3 and Year 4 data look like?
If a headteacher cannot see granular attainment data for every pupil in every year group at any point in the year, gaps are invisible until they appear as disappointing Year 6 results. The time to address a gap is in Year 3, not in the term before SATs.
If our SATs results are below where we want them, what is the root cause?
Disappointing SATs results in Year 6 / Primary 7 often reflect gaps that were present in Year 3 or Year 4 but were not identified in time. Addressing the symptom in Year 6 without addressing the cause in lower KS2 will produce the same results the following year. Rockmount Primary’s own published strategy identified exactly this pattern: pupils achieving well but failing to convert to greater depth because of gaps in prior knowledge. Read what they did about it, or see our primary maths programme comparison for an honest assessment of the main options.
Pupils achieve exceptionally well. The curriculum is carefully thought out in a logical order.
— Ofsted, Rockmount Primary School, June 2025
Frequently asked questions
Common questions from headteachers and maths leads about KS2 SATs maths preparation.
When do KS2 SATs maths tests take place?
KS2 SATs take place in the second week of May each year. Maths papers are sat towards the end of the week and include an arithmetic paper and two reasoning papers. Results are returned to schools in July. The preparation that determines those results happens across the preceding five years of primary school, not in the weeks immediately before the tests.
What does the KS2 maths SATs arithmetic paper test?
The arithmetic paper tests speed and accuracy in written calculations, including the four operations, fractions, decimals and percentages. Pupils who lack instant recall of number facts (times tables, number bonds, additive facts) will use working memory on basic computation instead of on the calculation itself, reducing both speed and accuracy. Fluency built across Years 1 to 5 is what the arithmetic paper rewards.
What does the KS2 maths SATs reasoning paper test?
The reasoning papers test the ability to apply mathematical knowledge to problems and multi-step questions. Analysis of the 2025 papers found that only 38% of questions came from the Year 6 curriculum. The majority tested content from Years 3, 4 and 5. Pupils who have genuinely secured the foundations of lower KS2 are better placed to access the reasoning papers than those who have covered Year 6 content without those foundations in place.
How can Big Maths improve KS2 SATs maths results?
By helping schools build the foundations properly from the start. Big Maths works from individual learning steps, builds fluency every week, and gives teachers regular gap data so problems can be addressed earlier rather than discovered late in Year 6. Rockmount Primary School reached 90% at the expected standard in KS2 maths in 2025 against 74% nationally, with 44% at the higher standard against 27%. Read the full case study, or see how assessment and tracking works.
Does Big Maths cover the KS2 curriculum for all three nations?
Yes. Big Maths covers the national curriculum in England, Scotland and Wales. One subscription covers the full progression from Early Years / P1 to Year 6 / Primary 7, with all resources, assessment, tracking and gap analysis included.
What should schools focus on in the run-up to SATs?
In the final weeks before SATs, schools should focus on steady practice, confidence and familiar routines. That period can support performance, but it is not the moment when deep foundations are built. The bigger strategic question is what the maths programme has been securing year after year before pupils ever reach Year 6 / Primary 7.
See how Big Maths builds the foundations that SATs results depend on.
Book a free demo and we will show you the Baseline Assessment, the weekly Beat That! cycle, the Learning Gaps tool and the whole-school tracking view, and how together they build the foundations that move KS2 maths results.
Not ready to book? Send us a question or see the evidence.