Free · no paywall · in 3 languages

Learn the math,
one clear step at a time.

MathPrisma is a free interactive course that takes you from arithmetic foundations all the way to test-day mastery. Every lesson teaches the why, every widget lets you play with the idea, and endless auto-checked practice makes it stick.

Start with F1 · Operations & Integers Browse the full map →

23 interactive modules live · 40 on the roadmap

y=2x+1

m=63=2

Fig. 1 · A line you can touch. Drag the points — the equation follows.

Free to learn, always Every lesson, widget, and practice set is free. No paywall, no trial, no catch.
One guided path A single mastery-ordered journey from arithmetic to test day — you always know what comes next.
Built to be played with Ideas become draggable graphs, live calculators, and visual models you can poke at.
In your language The whole site in English, Spanish, and Portuguese.

The journey

Six stages, from arithmetic foundations to test day. Start where you are.

See every unit on the map →

How each module works

Learn

F5 · Percentages

“Percent” literally means per hundred. So 40% of 25 asks: cut 25 into 100 equal parts, then keep 40 of them.

40\% \times 25 \;=\; \tfrac{40}{100} \times 25 \;=\; 10

Every rule arrives with its why.

A plain-spoken walkthrough that builds the idea from scratch and shows why each rule works.

Explore

40% × 25 = 10

Hands-on tools — draggable graphs, live calculators, visual models — to build real intuition.

Practice

Endless auto-generated questions that check your work, track a streak, and reveal every step.

Practice Lab · free

Practice that never repeats itself

Every other practice set on the site runs inside one unit, where you already know what the question is about. The Lab mixes a whole stage together and hands you the exercise with nothing written at the top.

Fresh ladders made on the spot, never a fixed question bank.
Rest on any layer of the equation and it names itself.
Every solution step links to the lesson that teaches it.

Explore the Practice Lab

\dfrac{x - 7}{5}

= -1

The puzzle wall keeps growing

Can you crack it?

A tiny problem with a trap inside. Answer it right here — then watch the idea it hides come apart on the chalkboard.

Browse the puzzle wall →

Core

x + y = 10, x y = 21 x^{2} + y^{2} = ?

On the roadmap

Then sharpen for the real test

Once the curriculum has done its job, Test Readiness takes over: timed modules, full-length sections, error analytics, and drilling tools built to turn skill into score.

Mixed practice will be free. The advanced toolkit will be a one-time purchase that keeps the rest of the site free for everyone.

Preview Test Readiness →

Is MathPrisma helping you?

The whole course is free and always will be. A small donation helps keep it growing.

Support the project ♥

Learn the math,one clear step at a time.