# Math Builders

> Math Builders (mathbuilders.com) is a web-based math fact fluency app for
> kids. Short 2-to-5-minute adaptive practice sessions use spaced repetition
> (Leitner + SM-2) with a 3-second recall cutoff to build fast, durable recall
> of multiplication, division, addition, and subtraction facts. It is a
> practice supplement that works alongside any school curriculum — not a
> replacement for one. Runs in the browser as an installable PWA: no App
> Store, no download, always current.

## Product

- [Home](https://mathbuilders.com/): what the app does and how the method works
- [Pricing](https://mathbuilders.com/pricing): free practice and premium plans
- [For teachers](https://mathbuilders.com/teachers): classes, reports, and school use

## Free practice tools

- [Free math printables](https://mathbuilders.com/printables): catalog of worksheets, generators, trackers, and printable cards
- [Color by code worksheets](https://mathbuilders.com/printables/color-by-code): color by number sheets for any times table, divisor, or addition/subtraction set, each with an answer key
- [1st grade math printables](https://mathbuilders.com/1st-grade-math-printables): free printables selected from the catalog for Grade 1 skills
- [2nd grade math printables](https://mathbuilders.com/2nd-grade-math-printables): free printables selected from the catalog for Grade 2 skills
- [3rd grade math printables](https://mathbuilders.com/3rd-grade-math-printables): free printables selected from the catalog for Grade 3 skills
- [4th grade math printables](https://mathbuilders.com/4th-grade-math-printables): free printables selected from the catalog for Grade 4 skills
- [5th grade math printables](https://mathbuilders.com/5th-grade-math-printables): free fact-review printables for Grade 5 readiness
- [Division worksheets](https://mathbuilders.com/division-worksheets): make a printable division worksheet, no signup
- [Times tables practice hub](https://mathbuilders.com/times-tables-practice): quiz any table from 2 to 12 online
- [Multiplication facts practice](https://mathbuilders.com/multiplication-facts-practice): mixed 0-12 practice with slow-fact feedback
- [Division facts practice](https://mathbuilders.com/division-facts-practice): mixed divisor 1-12 practice, plus dividing-by-2 through dividing-by-12 pages
- [Multiplication timed test](https://mathbuilders.com/multiplication-timed-test): free online timed test with per-fact speed results
- [Multiplication flash cards](https://mathbuilders.com/multiplication-flash-cards): online cards plus a printable deck
- [Multiplication worksheets](https://mathbuilders.com/multiplication-worksheets): free printable worksheets, no signup
- [Multiplication table generator](https://mathbuilders.com/multiplication-table-generator): printable reference table 0-20
- [Mastery tracker PDF](https://mathbuilders.com/math-mastery-tracker-pdf): printable per-fact progress grid
- [Grade readiness tests](https://mathbuilders.com/is-my-child-ready-for-3rd-grade-math): free 1st-6th grade math readiness checks

## Guides

- [Math fact fluency](https://mathbuilders.com/math-fact-fluency): what fluency is and how to build it
- [How to memorize multiplication tables](https://mathbuilders.com/how-to-memorize-multiplication-tables): the parent playbook
- [Spaced repetition for math facts](https://mathbuilders.com/spaced-repetition-math-facts): the method and intervals
- [Best multiplication apps for kids](https://mathbuilders.com/best-multiplication-app-for-kids): our honest ranked 2026 comparison
- [Best math fact apps](https://mathbuilders.com/best-math-fact-apps): all four operations, ranked honestly
- [MathFactLab vs Math Builders](https://mathbuilders.com/mathfactlab-alternative): strategy instruction vs recall automaticity

## Contact

- support@mathbuilders.com