Every lesson
is a lab.
Teachers and AI write the curriculum together — then students learn it by running the experiment, changing one variable, and watching what breaks.
Free for teachers. No card, no ads, no student data sold.
How a lesson gets built
A teacher decides what a child should understand and how it should be taught. The AI does the volume work — drafting, varying, translating, checking. Neither half ships alone.
Sets the target
A classroom teacher names the misconception to fix — "students think heavier balls fall faster" — and the standard it maps to.
Drafts and varies
Claude writes the explanation, builds the simulation parameters, and generates 40 practice variants at six reading levels in nine languages.
Cuts and corrects
Two subject specialists rewrite what's wrong, dull, or age-inappropriate. Nothing reaches a child until a named human signs it.
Tested with kids
The lesson runs in real classrooms. Where students stall, the section gets rebuilt — usually within a week.
AI draft, lesson 6.2
"Acceleration due to gravity is a constant 9.81 m/s², independent of mass, as demonstrated by the equivalence principle."
After teacher review
"Drop a marble and a bowling ball together. They land together. Try it in the sim — change the mass slider as much as you like and watch the clock refuse to budge."
Reviewed by D. Okafor, 11 years teaching middle-school physics. Every lesson page carries the reviewer's name.
The interactive lab
These four run right here, in the page — no login, no download. It's the same engine students use, with the same controls.
Hit the target
Two different angles can land in the same place. Find both.
Set an angle and launch.
Mix to neutral
Get the beaker to pH 7. Then try it again using half as much water — does the recipe change?
Acid: hydrochloric, 0.1 mol/L.
Base: sodium hydroxide, 0.1 mol/L.
Colour follows universal indicator.
Start with 100 mL of pure water at pH 7.
Hares and lynx
Watch the two curves. Which one peaks first — and why does it have to be that one?
Green is hares. Amber is lynx.
Why the bottoms must match
Slide the pieces together. The bars only stack neatly when the two fractions are cut the same way.
Top row sets how many parts. Bottom row sets how many the whole is cut into.
1/2 + 1/3 = 3/6 + 2/6 = 5/6
The same idea, cut four ways
A six-year-old and a sixteen-year-old can both run the pendulum. What changes is the question we ask them afterwards.
Touch first, words later. One control, big targets, spoken instructions, no reading required to start.
Push the swing harder and count how far it goes. Sort objects that float from ones that sink.
Predict, then check. Students write down a guess before the sim runs, so being wrong becomes the interesting part.
Build a circuit that lights two bulbs. Feed a food web and watch what happens when the frogs disappear.
Change one thing at a time. Controlled variables, data tables, and a graph the student plots from their own runs.
Find the launch angle for maximum range. Titrate to neutral. Model a population crash.
Math behind the motion. The equations governing the sim are exposed, editable, and matched to exam specifications.
Derive the range formula and test it against the sim. Fit a rate law to your own titration data.
What each half is for
The teacher decides
- What counts as understandingEvery lab ends in a question a machine can't score by keyword matching.
- What a child of this age can handlePacing, reading level, and how much failure is productive before it's just discouraging.
- What gets cutReviewers delete roughly a third of every AI draft. That's the job working, not failing.
- The final sign-offNo lesson publishes without a named subject specialist attached to it.
The AI does the volume
- Forty versions of one worksheetSo a class of thirty gets thirty different problems at their own level.
- Translation and reading levelsNine languages, six reading levels, generated from a single reviewed source.
- Live hints during a labNudges toward the next step instead of handing over the answer.
- Spotting where a class stalledFlags the three students stuck on the same slider, before the lesson ends.
Where we're careful
- AI never talks to a child unsupervisedHints are pre-reviewed and scoped to the current lab. There's no open-ended chatbot for students.
- Student work stays with the schoolNever sold, never used to train a public model. Districts can export or delete everything, any time.
- Teachers can overrule anythingEdit a lesson, hide a lab, change a score. The classroom is not run by the software.
What a school gets
- Curriculum mappingEach lab tagged to your state or national standards, with gap reporting.
- Runs on what you ownChromebooks, shared tablets, a single projector at the front. Nothing to install.
- Onboarding in an afternoonTwo hours of teacher training, then a specialist joins your first three lessons.
Give a class something to take apart.
Start with one lab in one lesson this week. Teacher accounts are free, and always will be.