MathBuilders
Turn slow math facts
into automatic recall
in 2 to 5 minutes a day.
Built first for parents of kids who understand the lesson but still freeze on facts like 6×7 or 8+9. Math Builders finds the weak spots, spaces review by memory science, and gives you a calm 2-to-5-minute routine that works alongside school math, not against it.
Homeschooling multiple kids or teaching one classroom? See the secondary fits below.
5 min
before or after school
No card
required to start
Supplement
not a replacement program
Built first for parents in the fluency squeeze.
If homework goes off the rails because your child understands the method but cannot recall the fact fast enough, this is the gap Math Builders is designed to close.
Who it's for
Parents of 2nd-5th graders who know the concept is there, but the recall is still too slow.
Families who want a calm 2-to-5-minute habit before or after school, not another 30-minute battle.
Parents looking for a fluency supplement that works alongside classroom math.
Who it isn't for
A full curriculum replacement or all-in-one homeschool program.
Long drill blocks, worksheet-heavy remediation, or more busywork.
District-wide procurement, SSO, or school-admin reporting as the main use case.
Why yesterday's facts vanish by Friday.
And why cramming keeps failing.
If your child can answer 7×8 on Tuesday and blank on it Thursday, that is usually a memory-timing problem, not a motivation problem. Math Builders uses the forgetting curve to bring each fact back right before recall starts slipping, which is the highest-leverage moment to make it stick.
Memory without review
Facts fade fast, so the same homework struggle keeps coming back.
Memory with Math Builders
Each short review makes the next one easier until the fact feels automatic.
A 2-to-5-minute routine you can actually keep.
This is not a second curriculum. It is a short fluency layer that removes one of the most common sources of homework friction.
Spot the facts causing drag
A short first session shows where recall slows down, so you are not guessing whether the issue is concept understanding or raw fluency.
Review before they slip
Each fact gets its own interval, so practice shows up right before forgetting starts instead of after a full backslide.
Keep the habit short
Five focused minutes is easier to repeat tomorrow. The system serves only the facts due today, not a pile of busywork.
See confidence show up
As recall speeds up, the facts stop bottlenecking longer problems. You see the progress on the dashboard, and your child feels it in school math.
Calm practice for your child.
Clear proof for you.
Mastery, lifetime accuracy, and what is due next.
Short enough to tolerate.
Fun enough to repeat.
Parents care about fluency. Kids notice whether practice feels punishing. Math Builders keeps the routine visual, winnable, and clearly bounded so it is easier to come back tomorrow. Tap a card below to see what your child sees.
A few of the worlds they can unlock
The Farm
12 friends
Butterfly Garden
14 friends
Spaceport
12 friends
Homeschool families and
individual classroom teachers.
The homepage is written for suburban parents first, but Math Builders also works well in two narrower contexts: multi-child homeschool routines and teacher-run classroom warm-ups.
One short fluency habit across multiple kids
Use it alongside Beast Academy, Singapore, Saxon, RightStart, or your current plan. One family account can cover up to four children without turning facts into the whole school day.
Works alongside your curriculum
One routine across multiple ages
Same parent-facing progress view
A 2-to-5-minute warm-up for one class
Best fit for individual teachers who want a short fluency block, not a district-wide rollout. One classroom of up to 25 students can start free.
Free classroom tier to start
Kid-friendly sign-in flow
Per-learner stats for follow-up
Built by a parent who wanted math facts to stop hijacking the day.
Math Builders started from a simple problem at home: the lesson was usually not the issue. Recall speed was. When facts were shaky, everything after them felt heavier, including homework, confidence, and the willingness to keep going.
The routine that actually held up was short enough to do before school, calm enough to repeat tomorrow, and clear enough that a parent could see which facts were still dragging. That constraint shaped the product: 2-to-5-minute sessions, spaced repetition, and progress screens parents can actually read.
Not a full curriculum. Not a 30-minute drill block.
A short fluency layer for the part of math that most often turns into friction at home.
0 minutes
Daily practice time
0 free packs
Included before you pay
0 packs
Across addition, subtraction, multiplication, and division
Adaptive
Every fact scheduled individually
Why parents can trust the method.
You can look through the product screens, read the privacy pages, start free, and review the learning science before deciding if it fits your child.
Stats parents can actually read
Pack mastery, lifetime performance, due cards, and most-missed facts are all visible in the product.
Inspect itPrivacy notices are live
Privacy, COPPA, FERPA, and Terms pages are published and linked in the footer.
Inspect itFree start is real
Parents can begin with four free fact packs before deciding whether to pay.
Inspect it— Retrieval practice and spacing rank among the top-tier learning techniques across 700+ studies.
— Meta-analysis of 184 spacing studies confirms long-interval review nearly doubles retention vs. massed practice.
— Fact-fluency interventions in elementary students produce significant gains in higher-order math performance.
— Spacing + retrieval practice consistently outperforms traditional drilling for mathematics learning, K–12.
Start with the guide or printable
you need right now.
Whether you need a printable table, a fluency explainer, or a better way to compare practice apps, these free resources are here to help parents make the math-facts part easier.
Parent questions, answered.
Flashcards review every card on a flat schedule — wasting time on facts already mastered. Khan Academy teaches concepts, not fact fluency. Math Builders does one thing exceptionally well: it tracks the strength of each fact in your child's memory and serves it back at the precise interval that maximizes retention. The science is called spaced repetition, and it is the same engine behind tools used by tens of thousands of medical students worldwide.
Math Builders is designed for ages 6–12 — second grade through middle school. Younger learners build addition and subtraction fluency; older learners drill multiplication and division. The first session adapts quickly, so a kindergartener and a 7th grader on a refresher both get the right level on day one.
No — and this is counterintuitive. Memory consolidation requires sleep and time between reviews. Two short sessions on different days produce dramatically more durable retention than one 30-minute session. We cap sessions at 5–7 minutes intentionally. More minutes per day will not accelerate fluency; consistent daily practice will.
Free to start, no credit card required. The free tier includes four fact packs: addition to 20, subtraction to 20, mixed addition and subtraction to 20, and multiplication through 6×6. Paid plans unlock the full library, more learner capacity, and deeper analytics.
Math Builders has published Privacy, COPPA, and FERPA pages, and the app is built around those constraints. The privacy policy explains what data is collected, how progress is stored, and how to request access or deletion through the in-app Feedback button.
Many kids do better when practice is short, predictable, and winnable. Math Builders uses streaks, unlockable worlds, and friendly characters to make it easier to come back tomorrow, but the biggest design choice is keeping sessions short enough that they do not feel like a second homework block.
Start free.
See which facts need work.
No credit card. No long setup. Just start practicing. The first session quickly shows which facts are slow and what to practice next.
Includes addition & subtraction to 20 and multiplication through 6×6 for free