Guide for parents · September 2026
Year 6 To Year 7 With Guided Practice
The maths seam between Year 6 and Year 7: what KS2 finished, what KS3 assumes without reteaching, and the skills that fall down the gap over the summer.
The gap is a handover, and handovers lose things
This page is about one narrow thing: the seam between the end of Key Stage 2 and the start of Key Stage 3 in maths. Not the whole of Year 7, and not primary generally. The seam itself, because it is where a particular kind of loss happens and because the loss is predictable enough to plan for.
Two systems meet here and neither owns the join. Primary maths spends Year 6 consolidating and then assesses. Secondary maths opens in September assuming that consolidation happened, with a cohort drawn from several primaries that taught it differently. In between sits six weeks in which nobody does any maths at all.
What Year 6 finishes, and what Year 7 starts on
| Settled by the end of Year 6 | Opened up early in Year 7 |
|---|---|
| Formal written methods for all four operations | The same operations with negative numbers |
| Fractions: equivalence, adding, simplifying | Fractions as division, and as operators on quantities |
| Place value into decimals, rounding | Powers of ten, standard-form groundwork |
| Simple ratio and proportion language | Ratio as a multiplicative relationship, scaling |
| Missing-number problems | The same problems written with letters |
| Percentages of amounts | Conversion between fractions, decimals and percentages in both directions |
Read the two columns together and the pattern is clear. Almost nothing in the right-hand column is new material. It is the left-hand column generalised, abstracted, and written in different notation. Which means a child arriving with a soft skill on the left does not meet it again as a topic — they meet it as an assumption.
The three things that go missing at the seam
The first is fluency with number facts. Times tables, doubles and halves were practised daily in primary and then stop being practised. Secondary assumes them and does not timetable them. A child computing 7 times 8 in the middle of a fractions question has less attention for the fraction, and the resulting errors get filed as carelessness.
The second is fractions. Year 6 gets fractions to a working standard; Year 7 immediately builds ratio, percentage conversion and algebraic fractions on top. A common denominator that was shaky in June is a wall by November.
The third is the habit of showing method. Year 6 encourages it and Year 6 assessment rewards it. Over the summer it evaporates, and a child doing everything mentally in September becomes invisible to a teacher who cannot see where the error entered. This one is behavioural rather than mathematical and is the easiest of the three to restore.
Two structural facts worth knowing
Key Stage 2 assessment results reach secondary schools as a prior-attainment figure, and that figure is often what sets initial groupings and target grades. It is a snapshot of one week in May, taken by a ten- or eleven-year-old, and it contains nothing about which skills were weak.
Most secondary schools also run their own baseline test in the first weeks. It is sat by a child who has just changed schools, lost their friendship group and not done any maths since July. It is a reasonable administrative instrument and a poor description of a child, and both numbers can be asked about rather than accepted.
The summer, without turning it into school
Six weeks of nothing is enough to lose fluency and not enough to lose understanding. The fix is small and dull rather than a holiday workbook.
- Ten minutes of times tables, a few times a week, out loud, in the car.
- One fraction question a day for the last fortnight of August, nothing more.
- Money, change and restaurant bills done mentally, which is percentage and division wearing normal clothes.
- Ask for the method out loud rather than the answer, to bring the habit back before term.
Ambitious summer schedules are usually abandoned in week two and leave a sour association. Small and finishable is the entire point.
Using a check at the seam
This is the moment a short maths check is most informative, because the school does not yet know your child and you are between two teachers who could tell you. Twenty questions spanning eighteen skills, free, no card, about twelve minutes, and crucially reaching back into Year 5 material rather than only testing Year 6.
The useful output is the single weakest skill rather than the overall score. If it comes back as factors and multiples, or equivalent fractions, or place value, you have found something that Year 7 will assume in its first term and will not reteach.
What this cannot settle
It will not tell you which set your child should be in, will not predict how they will find secondary maths, and is not an argument to take to a school about placement. It also covers a deliberately narrow band of skills — number, fractions, percentages, ratio and early algebra — which is where the seam bites, but is nothing like the whole of either key stage.
And the transition is not only mathematical. A child struggling in September may be struggling with a bus route and a locker, and no maths check will show you that.
Questions parents ask about the move to Year 7
Should we do a maths tutor over the summer?
Usually not. Six weeks of paid tuition before a school has even met your child is buying a solution to an unidentified problem. If you want to spend something, spend twenty minutes finding out what is weak.
My child got a good Key Stage 2 result but seems lost now.
A strong result means they answered that paper well. It does not rule out a specific gap, because a paper samples broadly and a single weak skill costs only a few marks. Gaps become visible when something is built on top of them, which is exactly what Year 7 does.
Will the secondary school reteach primary maths?
Some of the early Year 7 term revisits number deliberately, and how much varies a great deal between schools. It is fair to ask at the first opportunity what the plan is for children arriving with gaps.
Is it worth telling the new school what we found?
Yes, briefly and specifically. A short note to the maths teacher naming one skill is far more actionable than a general concern, and it arrives before the first assessment rather than after it.