When a child says: I can't do this
| confidence, maths, parenting
A child sits over fraction homework, the eraser has worn the paper thin, and then the sentence arrives: “I can’t do this.” Ask a follow-up question and you get the sharper version: “I’m just too stupid for maths.” The tone is not defiant. It is matter-of-fact, like a statement about the weather. That is exactly what makes it hard to hear.
I know this sentence from the inside. I came to Germany as a child and understood neither the language nor the lessons. My exercise books were a collection of red correction marks, and every report card felt like a verdict on my future. For me, “I can’t do this” was not a passing mood. For years, it was the working assumption.
The sentence is common, not alarming
The first thing that would have helped me to know as an adult: this feeling is not rare, and it is not a sign that something is broken. When the OECD surveyed fifteen-year-olds around the world for the 2012 PISA study, 30 percent said they feel helpless when doing a mathematics problem. 61 percent worried about getting poor grades in maths. If you meet this sentence at your kitchen table tonight, you are not looking at an unusual case. You are looking at something very common.
That takes nothing away from the urgency of the moment. But it changes the question. It is no longer “what is wrong with my child” but “how do I answer something almost every child thinks at some point”.
Why “but you’re so smart” can backfire
The reflex of most parents is contradiction: “That’s not true. You’re so smart!” The intention is good. The research on it is sobering.
In a well-known series of experiments, Mueller and Dweck had children solve puzzles and then praised them differently: some for being clever, others for their work. The children praised for cleverness went on to pick the easier tasks, where they could not fail, and gave up sooner after a setback. The children praised for their work more often picked the harder tasks. Praise a trait, and a child apparently also learns that this trait is now at stake.
A research group led by Eddie Brummelman later found something similar for inflated praise: phrases like “that is incredibly beautiful” led children with low self-esteem, precisely the ones the praise was meant to lift, to pick the easier task next time. The authors suspect that big praise sets a bar a child would rather duck under next time.
Taken together, this is an uncomfortable picture: precisely the best-meant sentences can teach a child to avoid challenges.
What mindset research promises, and what it delivers
At this point parenting guides almost always bring up “growth mindset”, often with the promise: teach your child that effort is everything and the grades will follow. That is what many books say. It is not what the data says.
A pair of meta-analyses by Sisk and colleagues covering more than 365,000 students found only a weak link between mindset and achievement (r = 0.10), and mindset trainings barely improved performance on average (d = 0.08). A newer meta-analysis by Macnamara and Burgoyne concludes that even this small effect does not hold up after correcting for bias. The largest single study, the National Study of Learning Mindsets with over 12,000 ninth-graders, found an improvement of 0.10 grade points, and only among previously lower-achieving students.
Summed up honestly: as a lever for better grades, this is thin. What the experiments do show quite consistently is something else: the way we talk about ability changes which tasks a child is willing to attempt and how they handle the next mistake. That is less than the guides promise. It is not nothing.
Make the sentence smaller instead of arguing with it
So what does this mean in practice, when the sentence lands at the kitchen table? I will describe what I have seen with my nephews and nieces, and I will label it for what it is: experience from one family, not a study.
Direct contradiction helps least. “Of course you can” is, from the child’s point of view, a claim made by someone who does not have the fraction sheet in front of them. What works more often is shrinking the sentence: “Which part exactly?” Then “I can’t do maths” becomes “I don’t know how to make unequal denominators equal”. The first is a verdict on a person. The second is a task, and tasks have starting points.
When I wrote Mind Garden, I let Mika walk exactly this path. He fails a maths test at the start, and a loudspeaker in his head shouts “failing means repeating the year”. The turning point of the story is not that Mika suddenly becomes good at maths. It is the moment he recognises the thought as a thought, gives it a name, and by naming it separates it from himself. In the book, a thought like that is called a weed. You can pull it, but only once you stop mistaking it for the garden.
This is not a technique that guarantees grades. It is the distinction the boy with the red marks in his exercise books was missing: that “I can’t do this” describes one afternoon and one worksheet. Not a future. My future was never written in those report cards, but nobody could tell me that at the time, because I was the one insisting loudest that it was.
This piece is by Dr. Wahed Hemati, author of the children’s novel Mind Garden: As You Think, So You Grow for children aged 9 and up.