Young Geniuses · Ages 13 to 14
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Young Geniuses · Ages 13 to 14
All Young Geniuses gamesCircle Theorem Grid
Apply advanced circle theorems to fill a logic grid in the astronomical navigation archives, for ages 13 to 14.
PuzzleLogic grid solved using circle theorem rules~7 min per level4 levelsAll devices
- Free · no account required
- COPPA compliant
- +10 XP per level
- 4 levels
- Plays on all devices
- Curriculum-aligned
The learning journey
Every activity is one step. Here is where this one fits.
- Play(you are here)Learn the idea in a game
- PractiseLock it in on paper
- ReviewCome back and keep it sharp
- MasterTake on a harder challenge
- AchieveEarn a certificate
About Circle Theorem Grid
Circle Theorem Grid sets students in the astronomical navigation archives, where orbital geometry maps hide missing angles. Each row applies an advanced circle theorem — the tangent–radius right angle, the alternate segment theorem, or the angle between two tangents — and learners reason through the grid to recover every value, deepening their command of GCSE Higher circle geometry. It is built for ages 13 to 14 (grade 8 and grade 9, GCSE Higher) with clear instructions, large touch targets, and progressive difficulty, so students can work independently or alongside a parent. Correct answers bring encouraging feedback and a small celebration, while mistakes are never punished and simply invite another try, which keeps confidence high. The challenge grows step by step so it always matches the learner, supporting steady progress across the upper-secondary and GCSE Higher curriculum used in the US, UK, Canada, and Australia. The game runs in any modern browser with no app to install, no sign-up, and no advertising shown to children. Progress is saved only on the device and appears in the Parent Dashboard, so families can follow growth without any data leaving the browser. It pairs well with our Young Geniuses worksheets for offline practice of the same skills.
Where to go next
Chosen by the skills this activity practises.
Next — more of the same skill
Printable worksheets for this skill
A hand for grown-ups
- Before you start
- Point out a few shapes in the room first. Geometry starts with noticing, and it is everywhere.
- While they work
- Encourage them to turn shapes around and look from different angles — literally, with a real object if there is one.
- Afterwards
- Go on a shape hunt around the house together. Naming real shapes cements the vocabulary.
- Watch out for
- Thinking a rotated square is a "diamond", or that size changes what a shape is. Turning a real cut-out shows it is the same shape.
- Away from the screen
- Spot shapes on a walk, build with blocks, fold paper into shapes. Talk about corners and sides.
How to play
A question appears on screen
A maths question is shown in large text at the centre of the play area. A timer bar begins counting down from 100 seconds.
Choose the correct answer
Answer options are shown as large buttons. Tap and drag, or use the mouse on desktop. Any input method works — touch, mouse or keyboard.
Build your streak
Each consecutive correct answer increases your streak. A longer streak lights up the flame icon and adds a bonus multiplier to the XP you earn for the level.
Finish the level
Each level has 4 questions. Complete them to earn the full level reward (+10 XP, plus up to +10 XP for a perfect run). Progress is saved locally and shown on the Parent Dashboard.
Curriculum alignment
Mapped to national curriculum frameworks so teachers and parents can match practice to school standards.
- United StatesCommon Core State Standards for Mathematics · geometry, circle-theorems, reasoningAligned to geometry, circle-theorems, reasoning number and operations objectives.
- United KingdomNational Curriculum for England — Maths · geometry, circle-theorems, reasoningAligned to geometry, circle-theorems, reasoning number and operations objectives.
- AustraliaAustralian Curriculum v9.0 — Mathematics · geometry, circle-theorems, reasoningAligned to geometry, circle-theorems, reasoning number and operations objectives.
- CanadaPan-Canadian Provincial Standards · geometry, circle-theorems, reasoningAligned to geometry, circle-theorems, reasoning number and operations objectives.
Frequently Asked Questions
- It is designed for ages 13 to 14 (grade 8 and grade 9, GCSE Higher) and follows the upper-secondary curriculum.
- Yes. It is touch-first with large targets and runs in any modern browser, with no app to install.
- Students apply the tangent–radius angle, the alternate segment theorem, and the angle between two tangents.
- Progress is stored only on the device and appears in the Parent Dashboard. Nothing leaves the browser.
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