Why timed math tests don't help (and what to do if your kid's school still uses them).

The 30-second version.

Fact fluency is a real and worthwhile goal — kids who can recall basic facts quickly have more working memory left for the actual problem. But the timed test doesn't build fluency; it measuresit, badly, while adding a stressor that degrades the very thing it's measuring. Ramirez and colleagues (2013) showed that math anxiety eats working memory, and that this hits high-working-memorykids hardest. Jo Boaler's synthesis of this work argues that timed conditions are a leading early cause of math anxiety, and that fluency is better built through number sense and reasoning than through speed drills. The fix at home is to decouple two things the timed test welds together: knowing your facts, and being fast under a clock.

What fluency actually is (and isn't).

Fluency is the ability to recall and use number facts flexibly, accurately, and efficiently. The key word is flexibly. A fluent kid who blanks on 8 × 7 doesn't freeze — they reason: “8 × 7 is 8 × 8 minus 8, so 64 minus 8, 56.” That derivation isfluency. It's fast, it's reliable, and it leans on the kind of number sense that transfers to harder math later.

The timed test rewards a narrower thing: instant rote recall, with no credit for the reasoning path. A kid who derives 8 × 7 in two seconds “loses” to a kid who memorized it in one — even though the first kid's skill is the more durable one. So the test isn't just stressful; it's measuring a thinner construct than the one we actually want, and rewarding the thinner construct trains kids to chase it.

The working-memory mechanism.

This is the core of it. Working memory is the small, finite mental workspace where a child holds the numbers they're operating on. Ramirez, Gunderson, Levine, and Beilock, in a 2013 study of first- and second-graders published in the Journal of Cognition and Development, found that math anxiety was negatively related to math achievement — and crucially, that the relationship was strongest for children with the most working memory.

That finding is counter-intuitive until you see the mechanism. High-working-memory kids tend to use working-memory-intensive strategies: derivation, decomposition, holding several steps in their head at once. Those are the goodstrategies — and they're exactly the ones a stressor disrupts. When anxiety occupies part of the workspace, the kid relying on the rich strategy loses the resource that strategy depends on. The kid using simpler counting takes less of a hit, because they had less to lose. So the timed condition doesn't just frighten kids; it specifically degrades the performance of your strongest mathematical thinkers, and it does it in the moment you're trying to assess them.

A clock is itself a secondary task. Tracking “am I going fast enough” runs in parallel with the arithmetic and competes for the same workspace. This is why the same child, on the same problem set, very often does better untimed: you gave them their working memory back.

Where the anxiety comes from.

Boaler's argument, laid out in her widely cited Fluency Without Fear(2014, Stanford's youcubed) and her broader work, is that timed testing is one of the earliest and most avoidable sources of math anxiety. The sequence is grimly predictable: a kid who is perfectly capable at math meets the clock, underperforms because ofthe clock, concludes from the low score that they're bad at math, and begins the slow withdrawal that turns a temporary stress response into a stable self-belief.

And math anxiety, once established, is durable and self-reinforcing — it starts as early as first grade, it depresses performance for years, and it pushes kids away from the math-heavy paths that were open to them. A sixty-second drill is a strange thing to risk that on. We unpack the full anxiety picture in the math-anxiety post; the short version is that the timed test is a near-perfect anxiety generator, and the kids it generates the most anxiety in are often the ones with the most to offer.

But fluency does matter — so what builds it?

None of this is an argument against fluency. A kid who has to reconstruct 6 × 7 from scratch every time has less working memory left for the long-division problem it sits inside, and that's a real cost. The disagreement is purely about method. The methods with the best evidence behind them share a feature: they build recall as a side effect of reasoning, not by drilling speed directly.

Number talks and strategy.Asking “how did you get that?” and “is there another way?” builds the flexible web of relationships that makes recall fast and robust. A kid who knows 7 × 8 ten different ways isn't slower than a kid who memorized it one way; they're more durable.

Spaced, low-stakes retrieval.A few facts, revisited across days, with no pressure, beats a massed drill every time in the memory literature. The retrieval is what builds the memory — but only when the retrieval isn't drowned out by stress.

Games and reasoning, not races. The same facts practiced inside a game, a puzzle, or a real problem stick better than the same facts practiced against a stopwatch, because the kid is thinking about the numbers instead of thinking about the clock.

What to do at home when the school still times.

Plenty of good schools still run timed drills; this isn't a reason to declare war on your kid's teacher. It's a reason to do a few specific things at home.

Separate the two skills out loud.Tell your kid, in plain words: “The timed test measures how fast you are today. It does not measure how good at math you are. Those are different things.” Naming it strips the score of the identity meaning that does the long-term damage. The kid can be matter-of-fact about a fast-test score the way they're matter-of-fact about how fast they can tie their shoes.

Practice the facts untimed, then add gentle speed last.Build the recall first, with no clock, until it's solid. Then, if speed is the school's goal, you can add a low-stakes, against-your-own-best timing element — but only after the fact is genuinely known, so the clock is measuring retrieval and not generating panic. Speed comes after fluency, not before it.

Reframe the wrong ones as information.When a fact is missed, “okay, that's one to practice” keeps it neutral. A missed fact is a to-do item, not a verdict. The tone you use here is most of the intervention.

If it's genuinely hurting your kid, talk to the teacher.Many teachers run timed tests out of habit or district policy, not conviction, and a calm note — “the timed format is producing real anxiety; could she do it untimed, or in a low-stakes way?” — is often met with accommodation. You are not being difficult; you're sharing data the teacher wants. And if your child has a documented learning difference, extended or untimed conditions are a standard, reasonable accommodation worth asking about.

What we built for this.

Koda was designed with this research in front of us, and one of its defaults is the direct expression of it: in normal tutoring and practice, there is no clock.Your child works at their own pace, on paper, and the tutor checks each step deterministically without ever racing them. Speed is a thing that arrives on its own once a fact is genuinely known; it's never the thing Koda pushes for.

We do ship a focus timer — a visible countdown a child can start at the top of a work chunk, with gentle transition warnings before a break. That's a tool for pacing and attention, the opposite of a speed drill: it protects a calm working window, it never counts your kid down against a quota, and it isn't a test. And because rushing is exactly what we don't want to reward, the XP system gives more credit for showing your work and for using a hint wisely than for a fast right answer — and there are no streaks to make a kid feel they're racing the calendar either.

Koda also runs a real exam mode for the kids whose schools test them — and during it, the tutor goes completely silent: no hints, no nudges, no cheerful interjections, with the review saved for afterward. The point isn't to pretend tests don't exist; it's that the practice that builds the skill and the assessment that measures it are different moments, and the everyday work shouldn't feel like a stopwatch.

If you want to know when it's available, drop your email at the waitlist. We email a few times. Total. From a real person.