· Math Explorers Club · Math Competitions · 10 min read
Best Math Competitions for 3rd Graders
A 3rd grader can enter four real national math contests — and as of this year, every one of them can be set up from home. Here's what each looks like, plus the bigger competitions that open up next year.
Third grade is a sweet spot for math competitions. Your child is finally old enough to read a word problem on their own, young enough that the contests are still gentle and welcoming, and — new this year — every one of the four national options open to a 3rd grader can be set up from your own home, no school team required. One of them, RSM, only just opened its online door at grade 3. You don’t need to be a math person to get your child into any of them.
This is the 3rd-grade shortlist. If you’d rather see every elementary contest laid out side by side, our complete guide to math competitions for elementary students is the full catalog, and our decision guide walks you through choosing. If you’ve also got a younger one at home, the 2nd-grade version of this post covers what’s open a year earlier. Here, we’re answering one question: what can a 3rd grader actually enter, and how do you sign them up?
The short answer: four contests you can enter from home
A 3rd grader can enter four nationally-recognized math competitions: Math Kangaroo, the RSM International Math Contest, the Noetic Learning Math Contest, and the Continental Mathematics League (CML).
Here’s what’s different from a year ago: at 2nd grade, RSM was in-person only, so families without a nearby branch were stuck. At grade 3, RSM’s online format opens up — which means all four of these contests can now be run from your kitchen table, without a school and without a long drive. That’s the headline for this age.
The famous olympiad names you’ve probably heard — MOEMS, AMC 8 — still don’t start in 3rd grade. But two of the bigger ones are closer than you’d think, and we’ll get to exactly when they open at the end.
The four math competitions open to 3rd graders
The quick version, then the details on each:
| Competition | How a 3rd grader gets in | Format | Cost | When |
|---|---|---|---|---|
| Math Kangaroo | You register directly — in person, proctored online, or self-proctored virtual | 24 questions, 75 min, multiple choice | $18 early / $35 late, per child | Third Thursday in March |
| RSM Int’l Math Contest | You register — grade 3 can take it online or in person at a branch | One timed sitting | ~$15 early / $25 general | Early February |
| Noetic | School team, or the At-Home Edition you proctor | 20 problems, 45–50 min | $99 / team or $29 / student | Fall (~Nov) & spring (~Apr) |
| CML — Grades 2–3 | Through the school, or as a “home school” entry | 3 meets, 6 questions each, written | $90 / team or ~$25 / child | Three meets, Jan–Mar |
Math Kangaroo — the simplest one to run yourself
For most families, this is the place to start. Math Kangaroo runs from grade 1 through grade 12, and a 3rd grader takes the Grades 3–4 level: 24 questions, 75 minutes, multiple choice with five answer choices each. The single best feature for a young test-taker is the scoring — there’s no penalty for a wrong answer, so a guess never costs your child anything. You can tell a nervous eight-year-old, honestly, that they can’t lose points by trying.
It’s also the easiest to start single-handed: you register your own child — no school, no team, no teacher to recruit. You can pick an in-person testing center, a proctored online center, or a self-proctored virtual sitting at home. It’s held once a year on the third Thursday in March (that’s March 18 in 2027), and registration runs about $18 if you sign up early and $35 later. No calculators allowed. To see exactly what the paper looks like, our Math Kangaroo format guide walks through it question by question.
RSM International Math Contest — and it just opened online for 3rd grade
The RSM Foundation runs an annual International Math Contest open to all students in grades 1–8 — you do not have to attend the Russian School of Mathematics to enter. The reason it belongs on a 3rd-grade list specifically: the online format begins at grade 3. For grades 1 and 2 the contest is in-person only, at an RSM branch. Starting in 3rd grade, your child can take it either in person or online from home — so the geography problem that ruled it out for younger kids simply goes away.
It’s a friendly, low-cost contest — about $15 if you register early, $25 afterward — held in early February, with registration opening around the start of October. If you skipped RSM when your child was younger because there was no branch nearby, this is the year to revisit it.
Noetic Learning Math Contest — and its $29 At-Home Edition
Noetic is built for elementary and middle schoolers, running grades 2–8, so a 3rd grader sits comfortably in the lower half of that range. The contest is 20 problems in 45 minutes on paper (50 minutes online), and it runs twice a year — a fall window around November and a spring window around April — so there’s more than one chance to try it.
There are two ways in. If your child’s school runs it, a teacher registers a team of up to 30 students for $99. But the detail most parents miss is the At-Home Edition: for $29 per student, you register your own child, proctor the contest yourself at home online (no calculators, phones, or internet; no re-takes), and get back a raw score, a national percentile, and a printable certificate. That national percentile is the part kids love — your child sees how they stacked up against tens of thousands of others across the country (Noetic drew more than 60,000 students in 2024–2025). It’s the best route for a family whose school doesn’t participate.
Continental Math League — through the school, or as a “home school”
CML groups 2nd and 3rd graders together on a shared Grades 2–3 paper, which means a 3rd grader is at the older, more confident end of that level — a nice place to be for a first try. It works a little differently from a one-and-done test: it’s a short season of three meets from January to March, each with 6 word problems that kids solve on paper and write out their answers to. CML provides step-by-step solutions for every problem, which makes it a teaching tool as much as a test.
A school orders a team for $90. But the part worth knowing is that CML also has a “home school” rate of about $25 per child — and “home school” doesn’t mean what you’d assume. In CML’s own words, it simply means a student who wishes to participate when his or her school does not. You register an account, email their support to have the home-school pricing applied, and then a parent can proctor the meets at home within the time limits. So even with no school team, CML is within reach for the price of a couple of lunches.
The competitions that open at grade 4 (so close you can see them)
Here’s something true for 3rd graders that wasn’t true a year ago: the next tier of competitions is now just one year away. Several of the bigger elementary contests start at grade 4 — meaning your current 3rd grader becomes eligible next year:
- MOEMS (Math Olympiads): its elementary division, Division E, begins at grade 4.
- Math League (the elementary contest): also starts at grade 4.
- MathCON: individual entry, grade 4 and up.
And a little further out, still firmly middle-school:
- AMC 8 and MATHCOUNTS: built for older students — AMC 8 is open to grade 8 and below, and the MATHCOUNTS Competition Series runs grades 6–8.
You don’t need to chase any of these yet. The useful way to look at it: 3rd grade is the natural warm-up year before the MOEMS / Math League / MathCON door swings open. A child who enjoys Noetic or Math Kangaroo this year walks into 4th grade already knowing what a timed problem set feels like. Our full elementary guide lays out that whole progression if you like to see the map.
Is your 3rd grader actually ready?
The reassuring truth: these contests are designed for this age, so a typical eight-year-old is squarely in range. You’re not looking for a prodigy. A few signs your child is ready to give one a try:
- They enjoy puzzles, brain teasers, or “how many ways can you…” kinds of questions.
- They can sit and focus on something for 45 minutes to an hour.
- They can read a simple word problem on their own — a real advantage 3rd graders have over younger kids, who often need problems read aloud.
- They’re comfortable with addition, subtraction, and the early multiplication facts, and they notice simple patterns.
That’s the whole list. This is about curiosity, not a label. A child doesn’t have to be “the math kid” to enjoy a morning of interesting problems.
How to choose one — without the stress
You don’t need to overthink this. Run down the list and stop at the first line that fits:
- Your school already runs Noetic or CML? Start there — the path of least resistance is a real advantage at this age.
- No school team, and you want the simplest possible start? Math Kangaroo or Noetic’s $29 At-Home Edition. Both are a few clicks and you’re done.
- No RSM branch nearby, but you want another from-home option? RSM’s online contest — newly available at grade 3 — in February.
- You like the idea of a written, work-it-out season — and a bargain? CML’s home-school entry at about $25.
Whichever you pick, keep the preparation small and cheerful. Fifteen minutes a few times a week, working through a problem or two together, beats any cram session — and at this age the goal is for your child to want to do another one. A standing, no-pressure habit is the easiest on-ramp, which is exactly why our free Problem of the Week exists: one interesting problem in your inbox, no cost, no stakes.
The thing that matters more than which contest you pick
It’s tempting to agonize over the “right” competition, but in 3rd grade the choice matters far less than the experience. A good first competition is one your child walks away from saying “that was fun, can I do another?” — and any of these four can deliver that if you keep the pressure low and treat the score as beside the point.
So pick one. Do a handful of practice problems together first so the format isn’t a surprise — our free Math Kangaroo practice problems for grades 3–4, with full step-by-step solutions, are matched to exactly this age. And for the morning of, with its nerves and its waiting and its car ride home, our guide on what to expect at your child’s first math competition is the one to read the week before.
A 3rd grader doing Noetic for fun is already on the road that leads to MOEMS next year and AMC 8 down the line. The first step is just signing up for one.
This article is not affiliated with or endorsed by Math Kangaroo USA, Kangourou sans Frontières, Noetic Learning, Continental Mathematics League, the RSM Foundation, MOEMS, Math League, MathCON, or the Mathematical Association of America. All competition details come from each organization’s official materials and can change — confirm dates and fees on the official site before you register.
Once you’ve picked one, we make affordable, original prep guides to match — for Math Kangaroo (Grades 3–4), Noetic (Grades 2–4), and CML (Grades 2–6). You can browse them all, or start completely free with our weekly Problem of the Week.