Taught, not tested.

Taught the way a patient parent would teach it — one idea at a time, and never with a score.

Log inInvitation-only · private testing

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The rule

No scores. No rankings. Never “wrong.”

Most apps measure. RadianArc mentors. The learner never sees a percentage, a grade, or the word “test.” Enforced in the code, not just the copy.

Math that clicks.

Fractions, percents, rates and proportions become one thread, not a pile of disconnected topics.

WITH ARC RadianArc Math

Science that sticks.

A river, a mystery, and real science — explored in a living 3D world, never drilled.

WITH NOVA RadianArc Science

One grade at a time, properly

UNCHARTED

IN THE SKY NOW

UNCHARTED

Built by a parent. RadianArc started as one parent’s answer to math anxiety at home. The philosophy — teach first, never rank, confidence before mastery — comes from watching a kid learn, not from a curriculum committee.