Teens · Ages 15–18

Social Studies · life skills — gathering and organising test feedback on something you made (user-research habits, iteration)

QueryForge

Ages 15–18 · Gr 9–12 Level 2

Read a SQL query, predict the exact result set — which rows, in which order — then run it to check. QueryForge shows you a table and a query, and asks you to think through WHERE, ORDER BY, DISTINCT and LIMIT before you press run (the habit that catches a bug before it ships). Every wrong choice is a real misreading the engine actually produces, so you learn where queries trip you. No timer, no score to chase; on-device, no account. Ages 15–18.

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BetaDojo

Ages 15–18 · Gr 9–12 Level 3

Someone tried your project? Capture it in three buckets — what worked, what confused, one thing to fix — so reactions become an action list. No score, no streak. On-device; nothing leaves your device.

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Computer Science · computational thinking — designing a when-then automation flow as an ordered sequence (if-this-then-that, decomposition)

FlowDojo

Ages 15–18 · Gr 9–12 Level 3

Design a routine: pick a "when," add the steps, reorder them, and read it back as a clear sequence — the if-this-then-that idea. No score, no streak. On-device; nothing leaves your device.

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Social Studies · life skills — planning a project launch (a ready-to-ship checklist, entrepreneurship habits)

RaceForge

Ages 15–18 · Gr 9–12 Level 3

Two tasks. One shared counter. What could go wrong? Predict the smallest value a data race can produce, watch the exact interleaving that loses an update, then wrap it in an actor and see the race vanish. RaceForge enumerates every possible interleaving on your device — no guessing, no magic — so you can feel exactly what Swift 6 is protecting you from when it checks concurrency at compile time. Ages 15–18.

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ShipDojo

Ages 15–18 · Gr 9–12 Level 3

Get your project ready to ship: build a launch checklist from real steps (and your own), check them off, and reach a calm "ready to ship." No score, no streak. On-device; nothing leaves your device.

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English & Language Arts · concise writing — crafting a five-to-seven-word tagline (word economy, the reader-at-a-glance test)

TagLineForge

Ages 15–18 · Gr 9–12 Level 3

Say what you made in five to seven words — the length a stranger reads at a glance. Write candidates, get a live length coach, pick the one. On-device; nothing leaves your device.

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Social Studies · Redistricting & the Efficiency Gap

BehaviorForge

Ages 15–18 · Gr 9–12 Level 4

Watch BFS, Dijkstra and A* search the same grid: all three find an optimal path, but a good heuristic makes A* explore far fewer cells. Classical game AI — how an NPC finds its way. Ages 15–18.

Play BehaviorForge →

Logic / Chess

ClassicsForge

Ages 15–18 · Gr 9–12 Level 4

Read the immortal games of chess for free — step through the Opera Game, the Immortal, the Evergreen, and Légal’s Mate move by move on a real board, tap any move to jump, let them auto-play, and follow a calm first-party commentary that shows WHY each classic still teaches. On-device; nothing leaves this device; no account.

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DistrictForge

Ages 15–18 · Gr 9–12 Level 4

The same votes, redrawn, can hand one side twice the seats. DistrictForge shows how winner-take-all districts turn a 55% vote into all 5 seats — or just 2 — depending on who draws the lines, through packing and cracking. Predict the seats, then measure the gerrymander with the efficiency gap argued before the Supreme Court. Non-partisan (Violet vs Orange), all exact, all on your device. Ages 15–18.

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DocentForge

Ages 15–18 · Gr 9–12 Level 4

Become a museum educator, ages 15–18: build a three-minute object talk (hook · look closely · the story · the question) for any object, then score it against your own rubric — the app never grades your speech, you do. Assemble a volunteer-application portfolio. On-device.

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DomeForge

Ages 15–18 · Gr 9–12 Level 4

Author a planetarium show, ages 15–18: choose a place and a month and the dome stages the real evening sky, then write a five-beat show about the stars, planets, and constellations that are actually up that night. On-device (the fulldome projection lives in the app).

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DriftForge

Ages 15–18 · Gr 9–12 Level 4

Selection has a direction; drift is pure luck — and in a small population, luck wins. DriftForge runs evolution on synthetic beetles: predict an allele’s frequency after a generation of selection, drift, migration or a bottleneck, then reveal the maths — and run 24 generations yourself to watch selection trace a smooth curve while drift wanders and a crash loses an allele by chance. Ages 15–18.

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ExhibitForge

Ages 15–18 · Gr 9–12 Level 4

Plan an exhibition, ages 15–18: pick a theme and objects within a budget, say the whole show in a 60-word big idea, light the fragile pieces so they survive the run — then defend your plan under questioning. The numbers must add up; the interpretation is yours. On-device.

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KindForge

Ages 15–18 · Gr 9–12 Level 4

Let the compiler catch it. Read a program and predict what the compiler will say — will it compile, or does a type error stop it? If it compiles, what does it print? If it doesn’t, fix it — without changing what it was meant to do. Swift’s types catch a whole class of bugs before the code ever runs. A will-it-compile reading lab across engine-verified programs. A teaching subset of the Swift language. Ages 15–18.

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LibraryForge

Ages 15–18 · Gr 9–12 Level 4

Read other people’s code. A small helper arrives from an open-source package — read its doc-comment and its code, predict what it prints, then answer the question an assistant never will: what breaks if one line changes? The skill for the age of a thousand dependencies. A code-reading lab. Ages 15–18.

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Career & Future Readiness

LocaleForge

Ages 15–18 · Gr 9–12 Level 4

Make your app speak every language. A person reads “phở” as three letters — but the software sees three letters, five bytes, and (decomposed) more code points than that. Read a word, a label, a sorted list; predict what the software counts, picks, or orders; then check it against the real Unicode and Intl engines. Software internationalization — where “how long is this word?” has more than one true answer. A read-the-strings lab. Ages 15–18. Vietnamese first.

Play LocaleForge →

NorthQuest

Ages 15–18 · Gr 9–12 Level 4

Explore where you’re headed: clarify what matters, weigh real paths, and author your own direction. No “right” answer. For teens.

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Probability & Statistics

OddsForge

Ages 15–18 · Gr 9–12 Level 4

Weigh the evidence: how surprising is a streak if the honest odds held? Read one-sided p-values off the binomial tail — and see how peeking until it “looks significant” manufactures a false alarm. Ages 15–18.

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Life Science

OutbreakForge

Ages 15–18 · Gr 9–12 Level 4

Epidemiology you can run, for ages 15–18. Pick a synthetic outbreak, predict what happens, then a deterministic SIR/SEIR model computes it — the curve, R₀, the herd-immunity threshold. Then you decide: vaccinate, reduce contact, and weigh cases prevented against the cost of restriction. No made-up people are harmed and there’s no single right answer. On-device, synthetic populations only.

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PackForge

Ages 15–18 · Gr 9–12 Level 4

Mods are data. Fix a broken content pack — bad rarities, impossible stack sizes, clashing ids — until it fits the schema and passes its tests. The discipline behind data-driven modding. Ages 15–18.

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PrimeDojo

Ages 15–18 · Gr 9–12 Level 4

Multiply two primes: easy. Un-multiply their product: nearly impossible. That one gap is why your bank is safe. PrimeDojo walks you from clock arithmetic to a working RSA key you build, encrypt with, decrypt with — and then BREAK by factoring, all by hand and all on your device. Predict each step, then watch the maths. Ages 15–18.

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ProvenanceQuest

Ages 15–18 · Gr 9–12 Level 4

Who owns the past? For ages 15–18: trace a museum object’s chain of custody through real documents — a repatriation claim, a colonial-era return request, an object with a missing decade — and decide what a museum should do. Arguments on every side; you weigh the evidence. On-device; nothing leaves your device.

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QubitForge

Ages 15–18 · Gr 9–12 Level 4

A qubit is just two numbers. A gate rotates them. Measurement squares them. That is the whole of quantum — no mysticism, exact arithmetic. Start in |0⟩, apply a gate, and predict the odds: 100%? a 50/50 coin? Watch two Hadamards cancel back to certainty (interference), then entangle two qubits into a Bell pair that always agree. QubitForge enumerates the exact amplitudes on your device. Ages 15–18.

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ReviewForge

Ages 15–18 · Gr 9–12 Level 4

You don’t write the code — you review it. A deterministic assistant, "Auto", submits a function against a spec; your job is to pick the test that catches its bug, find the faulty line, request changes, and confirm the fix. The reviewer’s skill for the agent era — and the assistant never hands you the answer. A code-review lab. Ages 15–18.

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Socratic Discussion & Argument (Speaking & Listening)

RiskDojo

Ages 15–18 · Gr 9–12 Level 4

A rare disaster you can’t afford, swapped for a small cost you can — that trade is all insurance is, and it’s just maths. RiskDojo builds the whole idea from expected value up: the fair premium, the deductible, and the law of large numbers that lets a pool cover a rare big loss and still break even. Predict each number, then reveal the worked step — and run a pool yourself to watch adverse selection break it. Ages 15–18.

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SeminarQuest

Ages 15–18 · Gr 9–12 Level 4

Run a real Socratic seminar with 2–4 people and one device: a text, an opening question, rotating roles (Opener · Tracker · Steel-manner · Closer), a talk-balance bar and a text-evidence tally. The device moderates the table — it never teaches, never grades, and there is no AI. End with each person’s one changed mind and a printable record. Built for homeschool co-ops, book clubs, and classrooms.

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Life Science

ShiftForge

Ages 15–18 · Gr 9–12 Level 4

The science of your sleep, for ages 15–18. Pick a schedule and the two-process model shows your alertness hour by hour — when you’ll be sharp, when you’ll crash — plus your week’s sleep debt. Then test a claim: does a later school start or a screen-free bedtime really help? Sleep as a science topic, not a tracker: nothing is recorded, and it’s not medical advice.

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Social Studies · Civic Action Research

SpecForge

Ages 15–18 · Gr 9–12 Level 4

Direct an AI agent — the skill for the agent era. You write the brief; a deterministic on-device agent does the work and shows its whole trace. But agents make confident mistakes: a fabricated citation, a wrong unit, an off-brief detour, a leaked detail. Your job is to catch them and fix the BRIEF (not the output), and re-run until it runs clean. Specification, verification, accountability. Ages 15–18, on-device, no cloud calls.

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Study Skills

StudyForge

Ages 15–18 · Gr 9–12 Level 4

Own how you study: pick the strategy that actually works for each situation, then check what you know. For teens.

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ActionQuest

Ages 15–18 · Gr 9–12 Level 5

Take on a real issue in your community — frame it, research it fairly, map who’s affected, design a feasible plan, then defend it to a panel. Honest, non-partisan action research. For teens.

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Media Literacy & Civic Reasoning

AgoraQuest

Ages 15–18 · Gr 9–12 Level 5

Judge a source, steelman the other side, deliberate a values question — where there’s a better answer you find it, where there isn’t you own your reasoning. For teens.

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Personal Finance

AidForge

Ages 15–18 · Gr 9–12 Level 5

Decode a college award letter like an accountant — loans are not aid. Read the real price. For teens.

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Social & Emotional Learning

AnchorQuest

Ages 15–18 · Gr 9–12 Level 5

Notice a thought, name the thinking trap, and practise a kinder, more balanced reframe — a calm CBT-skills toolkit for teens. Not a diagnosis, not therapy; nothing is saved anywhere but your device.

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Social Studies / History

ArchiveQuest

Ages 15–18 · Gr 9–12 Level 5

Read a primary source, predict what it can (and can’t) tell us, then the bench reveals the historian’s sourcing analysis. HIPP, corroboration, causation & DBQ skills for teens.

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Social Studies · Civics & Ballot Literacy (your first vote)

BallotQuest

Ages 15–18 · Gr 9–12 Level 5

Get ready for your first vote by reading the ballot itself: mark a synthetic sample ballot, decode each measure’s plain-language summary against its fiscal note, practise lateral reading on a made-up claim, and learn your state’s registration rules. Non-partisan by construction — no real candidates or measures. Ages 15–18. On-device, no data leaves your device.

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Scientific Method & Evaluation

BenchForge

Ages 15–18 · Gr 9–12 Level 5

Design the test, not just take it: spot leakage, find the hard cases, and see how the metric picks the winner. How to trust a number. For teens.

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Systems Thinking & Statistics

BottleneckForge

Ages 15–18 · Gr 9–12 Level 5

Find the step that really limits the outcome — predict, then let the math show you. Amdahl’s law, survival funnels, and how many shots it takes. For teens.

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Music & Performing Arts · Harmony

CadenceForge

Ages 15–18 · Gr 9–12 Level 5

Learn functional harmony from your own ear — hum the bass and name the chord, explore the progressions behind the songs you love, feel how cadences resolve, and write a bridge with a coach that only asks. Your analysis stays yours; no copyrighted charts, nothing recorded.

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Calculus

CalcQuest

Ages 15–18 · Gr 9–12 Level 5

Predict the limit, the slope, the area — then a real engine computes it and shows the rule. Precalc into calculus, made intuitive. For teens.

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Social Studies · Capstone Inquiry

CapstoneForge

Ages 15–18 · Gr 9–12 Level 5

Run a real capstone from driving question to oral defence — scope it, source it, build it, document how you worked, then defend it. Honest, AI-resilient inquiry. For teens.

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Critical Thinking & Causal Reasoning

CauseForge

Ages 15–18 · Gr 9–12 Level 5

Correlation is not cause — so train the moves that tell them apart. Each day, take a real observation and pick the soundest reasoning move: find the mechanism, run the counterfactual, name what would falsify it, or spot the hidden confound. Then weigh every shape the pattern could really be. No score, no streak — just sharper thinking. On-device; nothing leaves your device.

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ChallengeForge

Ages 15–18 · Gr 9–12 Level 5

Judge the three-minute app. A student-showcase entry lands on your desk with a rubric — read what it actually is, decide if it clears the bar (and if not, which pillar it breaks), then reveal the verdict and the fix. The skill a maker needs to ship: reading your own work the way a judge will. A rubric-judgment lab. Ages 15–18.

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Music & Performing Arts

ClefQuest

Ages 15–18 · Gr 9–12 Level 5

Predict the interval or chord quality, then a real Web-Audio engine plays it and the theory model proves you right. Intervals, scales, triads, harmony & ear-training for teens.

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Knowledge Commons & Open Science

CodeForge

Ages 15–18 · Gr 9–12 Level 5

Read real code, predict what it prints, then run it — a live interpreter proves you right. Loops, functions, lists, debugging. For teens.

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English / Language Arts

CognateForge

Ages 15–18 · Gr 9–12 Level 5

A comparative-linguistics word game for ages 15–18: nine words from seven languages hide three families of cousins that descend from one ancient root (like NIGHT · NOCHE · NUIT). Trace the root, meet the false friends. The twist: you can only group a word once you've shown you know what it means (the Meaning Rule). On-device; nothing leaves your device.

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CommonForge

Ages 15–18 · Gr 9–12 Level 5

Who owns knowledge? Read a licence, weigh open vs closed, and ask whether a claim can be checked. The civics of the commons that built modern science. For teens.

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Social Studies · Governance & Simulation

CommonsForge

Ages 15–18 · Gr 9–12 Level 5

Design the rules of a shared-resource community — then watch them work or break. For teens: give a village hidden appetites, set a quota, enforcement, penalties and a stewardship reward, run a season, and see the commons sustain or collapse (and a proxy metric beat the real goal). Computed on-device; nothing leaves your device.

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English / Language Arts

CorpusForge

Ages 15–18 · Gr 9–12 Level 5

A corpus-linguistics word game for ages 15–18: you set the tile bag. Sort each language’s letters, graphemes, and words by how often they really appear — the rare ones are worth the most — and discover Zipf’s law, why a tile isn’t a byte (Vietnamese NG is one unit), and why every language needs its own bag. The bag you build is the real data our word games run on. On-device; nothing leaves your device.

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Logic / Speedcubing

CubeForge

Ages 15–18 · Gr 9–12 Level 5

A speedcuber's browser workshop — time your solves with inspection and Ao5/Ao12/PB stats, study OLL/PLL algorithms on a real 3-D cube, sharpen notation and method across 16 kits, and think through real speedcubing calls with the coach. On-device; works signed-out.

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Logic / Draughts

DamaDojo

Ages 15–18 · Gr 9–12 Level 5

An International-draughts study hall for ages 15–18: play the 10×10 game — men that capture both ways and flying kings that slide the length of a diagonal — against a graded study bot or a friend, then review any position while the engine ranks every legal move and shows why one is stronger. Reason through real board decisions (the forced jump, the capture chain, the promotion race, the flying king, endgame tempo) with a text-forward coach. On-device; nothing leaves your device.

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Computer Science & Machine Learning

EssayForge

Ages 15–18 · Gr 9–12 Level 5

The essay coach that can’t write your essay. Plan a thesis and paragraph claims, draft in your own words with a Socratic coach that only asks questions, and save drafts to build a tamper-evident process receipt that shows the work is yours. On-device, nothing uploaded — never a grader, never an AI detector.

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FilterForge

Ages 15–18 · Gr 9–12 Level 5

Design a chat-safety filter and measure it honestly (ages 15–18): on a fully synthetic message set, set the risk threshold and rules that flag grooming, off-platform lures, and age-band mismatch — then face the two error costs on a real confusion matrix. A false alarm silences a child talking to a cousin; a miss lets the lure through. There is no perfect line. Deterministic; on-device; nothing leaves your device.

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Computer Science / Creative Coding

FirstJobQuest

Ages 15–18 · Gr 9–12 Level 5

The paperwork of your first job, made clear: predict your take-home pay then reveal the real stub, fill a W-4 and watch your paycheck move, and practice spotting a rental red flag, a good interview answer, and a job scam. Illustrative, on-device — nothing leaves your device.

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HS Physics

ForceForge

Ages 15–18 · Gr 9–12 Level 5

Predict the physics before it happens — final velocity, momentum, energy, orbits — then a real engine computes it. HS mechanics & more. For teens.

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GenForge

Ages 15–18 · Gr 9–12 Level 5

Predict what the generative rule will draw, then a real seeded engine runs the code and proves you right. Creative coding — pattern, randomness, color, shape & sound — for teens.

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World Languages / Linguistics

GlossForge

Ages 15–18 · Gr 9–12 Level 5

Decipher a made-up language from a few glossed sentences — infer the rule, then use it. For teens.

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HelixQuest

Ages 15–18 · Gr 9–12 Level 5

Predict how the alleles will sort, then a real Punnett-square engine computes the cross and proves you right. Genetics, cells, evolution, ecology — for teens.

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Visual Arts & Design

HueForge

Ages 15–18 · Gr 9–12 Level 5

Predict a colour harmony or which pairing reads clearest, then a real colour engine computes the exact hue and contrast to check you. Colour theory + composition for teens.

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InferForge

Ages 15–18 · Gr 9–12 Level 5

See the ideas AP Statistics students find hardest — the sampling distribution of the mean (the Central Limit Theorem) and what “95% confident” really means — by running the simulations yourself. Predict, then run 300 samples and watch. On-device, nothing leaves your device.

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Scientific Method

InquiryForge

Ages 15–18 · Gr 9–12 Level 5

Judge real experiments — read a study, predict whether it holds up, then spot the confound or the noise. For teens.

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Social & Emotional Learning · Peer Tutoring & Mentoring Skills

InsightForge

Ages 15–18 · Gr 9–12 Level 5

Proofs without words: reconstruct the argument a picture hides — then catch the pictures that lie.

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Personal Finance

LedgerQuest

Ages 15–18 · Gr 9–12 Level 5

Make real money decisions in a risk-free sim — then check what you know with 16 kits. For teens.

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English / Language Arts

LexForge

Ages 15–18 · Gr 9–12 Level 5

A lexicography game for ages 15–18: a word is on trial. Weigh the evidence, then rule — is it in the dictionary, disputed, or not a word at all? Discover how dictionaries really decide (usage, not authority, makes a word), and why some real words look invented and some invented ones look real. On-device; nothing leaves your device.

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HS Geometry

LocusForge

Ages 15–18 · Gr 9–12 Level 5

Conjecture the angle, the length, the area — then a real engine confirms it and names the theorem that proves it. Formal geometry, made intuitive. For teens.

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MentorDojo

Ages 15–18 · Gr 9–12 Level 5

Learn to tutor a younger child the way great teachers do: wait three seconds, give the smallest hint first, praise the strategy not the trait, and notice the confusion. Train the four moves, order a hint ladder, plan a real 15-minute session, and log your volunteer hours — all on your device. Ages 15–18.

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Music & Performing Arts · Production

MixForge

Ages 15–18 · Gr 9–12 Level 5

Critical listening for anyone who makes music on a laptop. Fix-the-mix puzzles you solve by ear — move the faders and EQ to match a reference, A/B your work, and learn LUFS literacy the hard truth: louder isn’t better. All sound synthesised on-device; nothing recorded.

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AI & Fairness

ModelQuest

Ages 15–18 · Gr 9–12 Level 5

Judge an AI fairly — compute what a model really does, then weigh the value trade-offs of deploying it. For teens.

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Game Theory

NashForge

Ages 15–18 · Gr 9–12 Level 5

Think one move ahead — read a real strategic game, predict what game theory says, then see the reasoning. For teens.

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Economics & Personal Finance

NimForge

Ages 15–18 · Gr 9–12 Level 5

The mathematics of who wins, for ages 15–18: play Nim (and its last-token-loses twist), then let the engine reveal WHY a position is won or lost — the Nim-sum, Sprague–Grundy values, and the golden ratio hiding inside Wythoff’s game. Play, conjecture, and the engine checks every small position. On-device; nothing leaves your device.

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Critical Thinking

OverrideForge

Ages 15–18 · Gr 9–12 Level 5

A confident AI assistant is right most of the time — and sometimes fluently, plausibly wrong. Solve a reasoning task, lock in YOUR answer first, then Glib gives its very-sure suggestion. Accept it, Verify it, or Override it — and see your reliance profile: where you leaned well, where you surrendered your own correct answer to a wrong one, where you distrusted a tool that was right. Calibrated reliance — knowing when to trust and when to check — is the skill nobody teaches yet. No timer, no score to chase; on-device, no account.

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Logic / Backgammon

PipDojo

Ages 15–18 · Gr 9–12 Level 5

A backgammon study hall for ages 15–18 — play full matches against a graded bot, keep a personal reviewable archive of every game, drill hit-spotting in a calm rated ladder, and reason through real board decisions (the pip race, the doubling cube, bearing off, the back game) with a text-forward coach. On-device; works signed-out; optional sign-in syncs your games and rating across your own devices.

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PlatformForge

Ages 15–18 · Gr 9–12 Level 5

Build a two-sided platform economy and follow the dollar (ages 15–18): set the take-rate, payout rate, and cash-out floor; a million simulated makers on a talent curve run for a year; predict, then read the honest ledger — creator share, the median maker, the top 1,000, and how few ever reach the floor. Deterministic; on-device; nothing leaves your device.

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Statistics

PriorForge

Ages 15–18 · Gr 9–12 Level 5

Every game starts at 5.5. Adjust the dummy votes, add real ratings, and watch a Bayesian average pull a small crowd toward the prior — the statistics behind every leaderboard. For teens.

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Math · Statistics & Simulation

ProseForge

Ages 15–18 · Gr 9–12 Level 5

Predict the rhetorical move — ethos, pathos, or logos — then a close-reading engine reveals the annotated argument and lets you revise. Rhetoric, tone, theme & argument for teens.

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Engineering Design

ProtoForge

Ages 15–18 · Gr 9–12 Level 5

Design under constraints — read a real engineering challenge, predict the best trade-off, then check the numbers. For teens.

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RatingForge

Ages 15–18 · Gr 9–12 Level 5

Build a rating system and watch it converge (and wobble). For teens: give six bots hidden true strengths, play a season, and watch Elo sort them — then change the K-factor and see the trade-off between fast and steady. Computed on-device; nothing leaves your device.

Play RatingForge →

HS Chemistry

ReactQuest

Ages 15–18 · Gr 9–12 Level 5

Predict what the reaction does — moles, molarity, pH, gas volumes — then a real engine computes it. HS chemistry, no lab coat required. For teens.

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Science · Physics of Driving (stopping distance & hazard perception)

RoadForge

Ages 15–18 · Gr 9–12 Level 5

Learn to drive with the physics underneath it: watch stopping distance grow with the square of your speed, feel the 3-second following rule as time, read a wet road, and train hazard perception on real developing scenes. Understanding & practice — not a substitute for state driver ed. Ages 15–18. On-device, no ads, no account.

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Logic / Chess

RookDojo

Ages 15–18 · Gr 9–12 Level 5

A chess study hall for ages 15–18 — play full games against a graded bot, keep a personal reviewable archive of every game, drill tactics in a calm rated ladder, and reason through real board decisions (the fork, the pin, the skewer, the discovered attack, the back rank, zugzwang, the opposition, prophylaxis) with a text-forward coach. On-device; works signed-out; optional sign-in syncs your games and rating across your own devices.

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Structural Biology & Biochemistry

ShapeForge

Ages 15–18 · Gr 9–12 Level 5

Shape follows sequence: predict what a protein segment folds into, what buries in the core, and how one changed letter (sickle-cell) reshapes it. The reasoning behind the AlphaFold era. For teens.

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ShipForge

Ages 15–18 · Gr 9–12 Level 5

The paperwork of shipping an app. An entry lands on your desk with a store rule — will it upload, pass review, earn the rating it claims? Read the submission, predict the verdict, then reveal the fix. The half of making a maker never sees until the store rejects it. A submission-review lab. Ages 15–18.

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Logic / Shogi

ShogiDojo

Ages 15–18 · Gr 9–12 Level 5

A shogi (Japanese chess) study hall for ages 15–18: play the full 9×9 game — with shogi’s soul, the DROP (a piece you capture switches sides and re-enters from your hand) and promotion in the far ranks — against a graded study bot or a friend, then review positions while the engine ranks every legal reply. Reason through real decisions (the drop, promotion, the drop rules, the castle, sacrifice for tempo) with a text-forward coach. Pieces show as clear English letters. On-device; nothing leaves your device.

Play ShogiDojo →

Logic / Go (Weiqi · Baduk)

StateForge

Ages 15–18 · Gr 9–12 Level 5

The screen is a function of state. Read a typed struct state + a declarative view and reason about it: what screen does it show? Tap a control — what shows now? And when a stored value goes stale after an event, redesign it — derive, don’t store. The declarative-UI thinking behind every modern app. A state-reasoning lab across engine-verified puzzles. A teaching subset of the Swift language. Ages 15–18.

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StoneDojo

Ages 15–18 · Gr 9–12 Level 5

A Go study hall for ages 15–18 — play full 9×9 games against a graded bot, then keep a personal, reviewable archive of every game and replay it move by move. Sign in (optional) to carry your games across your own devices. On-device; works signed-out.

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Computer Science · Game Design & Engineering (design → ship a game)

StudioDojo

Ages 15–18 · Gr 9–12 Level 5

A game-design studio for ages 15–18: take an idea from a one-line pitch to a shipped design — scope, build, playtest with a printed rubric on real people, revise, ship. Your coach only asks; the design is yours. Ship a design code you keep plus a real Roblox Studio (Luau) starter. On-device; nothing uploads.

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SyncForge

Ages 15–18 · Gr 9–12 Level 5

How does a shared world stay shared (ages 15–18)? Set the tick rate, latency, and whether you use interpolation or rollback, then predict what two players see across 200 ms of lag before the engine runs both screens side by side. See why cheaters exist, why the server must be the authority, and try the unfixable exercise: keep a world consistent with no server. Deterministic; on-device; nothing leaves your device.

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TideForge

Ages 15–18 · Gr 9–12 Level 5

A cap-and-trade climate trade game for ages 15–18: rebuild the coast of Gullwick, but every kiln you fire raises the shared Tide — cross the flood line and the outer coast washes out for everyone. Trade the capped kiln permits, weigh fast rebuilding against the rising water, and decide for yourself. Play three islanders or pass-and-play; a game about a dilemma, not a lesson with an answer. On-device, no accounts.

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Cryptography

VaultForge

Ages 15–18 · Gr 9–12 Level 5

Crack real codes — read a scrambled message, predict what it says, then break it. Caesar, Vigenère, frequency analysis. For teens.

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Linear Algebra

VectorForge

Ages 15–18 · Gr 9–12 Level 5

Linear algebra you can see, for ages 15–18. A 2×2 matrix is a transform of the plane — rotate, stretch, shear, reflect, flatten. Predict where a point lands, then watch the matrix move a shape: the determinant is how much it scales area, and the eigenvectors are the directions that don’t turn. It’s the on-ramp to the maths behind AI — a matrix is a neural layer. On-device, exact arithmetic.

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Music & Performing Arts · Voice

VivaQuest

Ages 15–18 · Gr 9–12 Level 5

Practice defending your work out loud. Enter your topic and key points; VivaQuest builds a question bank from YOUR own words at three depths — recall, explain, defend — and a partner asks them aloud while you answer and self-score. No microphone, no AI, nothing leaves your device.

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VoiceDojo

Ages 15–18 · Gr 9–12 Level 5

An honest, private vocal mirror for singers — cents-level pitch, vibrato, and onset, a range map that grows with your voice, a healthy warm-up ladder, and a relative vocal-load budget that tells you when to rest. No autotune, no feed, nothing recorded.

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