Class 6 – 12 · Physics · Chemistry · Biology · Maths

Chapters you read about. Experiments you can shove.

Every topic in the school syllabus has something worth poking at — a block that refuses to move, a flame that dies without air, a thermometer that stops climbing. That gap between the page and the thing itself is the one this site is trying to bridge.

See what’s built Or read why I’m building it
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playable now
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topics mapped
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classes covered
a = F / m  live no login · no install Class 11 · Physics
force-lab running
Position
0.0m
Velocity
0.00m/s
Accel.
0.00m/s²
drag the sliders — it’s the real thing Open full screen

The honest reason

A diagram can only tell you so much.

I kept noticing the same thing. Everyone nods along in class, then goes home, opens the book, and meets a flat picture of a block on a surface with an arrow labelled F. Nothing moves. Nothing argues back.

  • Change one number and you instantly see what it did. No waiting for the next class.
  • Get it wrong on purpose. Take the friction away and watch the block never stop.
  • Works on the phone you already have. No lab, no licence, no download, no login.

Physics notebook · Tuesday, 11:40 pm

Q4. A block of mass 6 kg is pushed with a force of 24 N. Find the acceleration.

a = F/m = 24/6 = 4 m/s²

Fine. I got the mark. But I still don’t know what 4 m/s² feels like. Does it shoot across the table? Or crawl?

Push the mass to 20 kg and the same 24 N barely nudges it. Nobody wrote that down for me — I had to drag the slider to find out.

The library

One topic, one thing to play with.

I’m going class by class, topic by topic. A few are finished and open. The rest are mapped out and on the way — filter it down and see exactly where each one stands.

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How this works

Three rules I’m not breaking.

01 — Free, always

Nothing behind a wall

No account, no subscription, no “unlock all chapters”. If a simulation exists on this site, it is open and it will stay open.

02 — It has to be touchable

Sliders, not slideshows

If you can’t change something and immediately see the consequence, it isn’t a simulation. It’s a diagram with extra steps, and I’d rather not build it.

03 — Slow, but honest

Built topic by topic

I’d rather ship one topic that actually teaches something than forty that look finished. The build log below is the real progress, not a marketing timeline.

Build log

What changed, and when.

Dates and all. If nothing has moved in a while, you’ll be able to see that too — which is roughly the point of keeping it in public.

Jump to the library

today Catalog mapped end to end. Every class from 6 to 12 has its topic list written down, so the gaps are visible instead of vague. new
today States of Matter is playable. Class 11 Chemistry — heat ice past the melting point and watch the thermometer stall while the bonds break. new
today Force Lab is playable. Class 11 Physics — three sliders, one law, and a graph of a = F/m that draws itself while you drag. new
next Friction. Tilt the plank degree by degree until the block gives way. Class 8 Physics. planned
next Ohm’s Law. A voltage knob, an ammeter that reacts, and the straight line hiding inside it. Class 10 Physics. planned
later Reflection & Refraction. Bend a ray through glass and find the angle where it refuses to come out. Class 10 Physics. planned

Two ways to help

Ask for a topic. It moves up the list.

If your exam is close, say which chapter hurts the most. Requests go straight into the build order — and if you teach, tell me which simulations your students would actually use.

No newsletter, no spam. One reply when your topic is up.

Noted — that’s the shape of it. Hook this form up to your inbox and it’ll actually send.