Comparing your child to their classmates — what marks do and do not tell you

6 September 2026 · by Larry

It usually arrives sideways. Another parent mentions what their child got. Or the paper comes home with the class average written at the top, and your child's mark is below it.

Whatever you had planned to think about that evening, you are now thinking about this instead.

The comparison is not useless. It just answers a much narrower question than it feels like it answers, and knowing which question that is makes it far less alarming.

What a class average actually is

An average is one number standing in for a whole room of children. It flattens everything that made them different.

It does not tell you how spread out the marks were. A class where nearly everyone scored close together and a class where half did very well and half struggled can produce exactly the same average, and being three marks below it means something quite different in each. The average alone cannot distinguish them.

It also cannot tell you what kind of paper it was. A topical test on last week's work and an end-of-term paper covering four months are two different tests, and a mark on one does not translate to the other. That is the same reason a fall in marks so often turns out to be about the paper rather than the child — what to check when marks drop suddenly goes through that in order.

So "below average" is a fact about one paper on one day in one class. It is not a fact about your child's ability, and it is definitely not a prediction.

The comparison you are actually making is smaller than you think

When another parent tells you a mark, you are hearing one number from one child, chosen and reported by someone with their own feelings about it.

You are not told whether that child found it easy or spent three weeks in tears getting there. You are not told what they scored last time. You are not told whether they were tutored through that exact topic the week before. None of that is anyone's business — but all of it changes what the number means, and none of it comes with the number.

Marks travel between parents the way holiday photographs do. They are real, and they are selected.

What a comparison can honestly show you

There is one thing it genuinely does well, and it is worth using.

If your child is well below the class on a topic that most of the room found manageable, that is a signal that something specific did not land — not that your child is behind in general. That is a narrow, useful, fixable finding, and it points you at a topic rather than at the child.

The check is the same one that works for a mark drop: are the lost marks concentrated in one topic, or spread across the paper? Concentrated is the better news. One thing missing is one thing to teach.

What the comparison cannot do is tell you whether your child is a capable mathematician, whether they are working hard, or what they will be able to do next year. Those are all real questions. The class average simply is not evidence about any of them.

The comparison that is worth making

Compare your child to your child.

Not to be gentle about it — because it is the only comparison where the conditions are held steady. Same child, same brain, same handwriting speed. Anything that changes is about learning rather than about who else happened to be in the room.

Three questions are worth more than any class ranking:

• Can they do something now that they could not do three months ago? Name it specifically. "Better at maths" is not an answer; "can now do two-step word problems without help" is.
• Is the same mistake still appearing? A mistake that has stopped appearing is progress, even if the mark did not move.
• Are they willing to attempt a question they are not sure about? This one predicts more than any mark, and it is the first thing to disappear when a child decides they are bad at the subject.

That last one matters enough to say plainly. A child who has concluded they are behind will stop trying the questions they are unsure of, and a blank answer looks exactly like not knowing. When your child says they are bad at maths is about how that takes hold, and freezing on a question they know covers what it looks like in an exam hall.

When your child is the one doing the comparing

Often they get there first. They know who finished the worksheet quickly and who got the star, and they have already worked out where they sit.

Two things help, and neither of them is telling a child that marks do not matter — they know that is not quite true.

The first is to be specific about what improved. Vague reassurance is easy to dismiss; "you got every one of the fraction questions right, and last month you got two" is not. It is also true, which is why it works.

The second is to be careful about speed. Children read finishing early as being clever, and it is one of the least reliable signals there is. A child who finishes first and gets six wrong has not done better than a child who finishes last and gets everything right. Timing your child, and when it helps covers where a stopwatch is useful and where it makes things worse.

What to do with the information

If the comparison genuinely bothers you, turn it into something you can act on:

• Look at the paper, not the mark. Which questions were lost, and were they lost for the same reason? Careless slips, one missing topic and running out of time look identical on a score sheet and need three different responses.
• Ask the teacher one specific question rather than a general one. "Did the class average move too?" and "is there one topic you would work on if you were me?" get real answers.
• Pick one thing. Not a programme. One topic, practised a little and often, until it stops being the thing that costs marks.
• Then stop looking at other children's marks for a term. You will get a much clearer picture of your own child's direction from three of their own papers than from twenty of everyone else's.

One paper is an event. Three are a pattern. And a pattern in your own child's work is worth more than any number written at the top of the page.