About Clarendium
Clarendium is a small, independent maths learning site for children aged 5–11. It turns short pieces of practice into a story, gives a hint and a worked explanation for every question, and keeps the parts parents worry about simple: no adverts, no in-game shop and no child accounts.
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Who makes Clarendium?
Clarendium is built independently by its maker, chaogetalks, and run by the Clarendium team. It has no investors and no advertisers, so the only way it will pay for itself is a family membership that parents choose to buy. That is why the site is designed to earn a parent’s trust first: every world can be played for free before anyone is asked for anything.
What does it teach today?
- Moonwell: a five-minute story chapter about equivalent fractions (halves, quarters, eighths, thirds and sixths).
- Number Grove: addition, from sums within 10 to three-digit totals.
- Subtraction Shores: subtraction, with an adding-back check on every answer.
- Multiply Mountain: equal groups and times tables up to 12 × 12.
- Fraction Falls: fractions of shapes, then equivalent fractions.
Levels follow England’s Year 1 to Year 6 and the US Kindergarten to 5th grade, so you can pick by school year rather than by age. The English year-by-year content follows the national curriculum in England: mathematics programmes of study, and the US grade pages follow the Common Core State Standards for Mathematics. Division, money, time and shape are not covered yet.
How is it designed?
- Short stages. Five questions per stage, three stages per world, and no countdown timer.
- Hints that teach. A hint shows the method and leaves the last step to the child; it never just reveals the answer.
- A worked answer every time. Right or wrong, each question ends with a short explanation of why.
- As little data as possible. Progress stays in the browser on your device. We never ask for a child’s name, email or photo. See the privacy policy.
What is still being built?
Clarendium is an early preview. Memberships are not open yet and no payment can be taken; the plans page shows the proposed prices and the parent waitlist. A parent account with a profile for each child and a weekly parent progress email are planned for when memberships open.
Questions, corrections or ideas are welcome on the contact page.