Checked by code
Every step, checked.
Code works each problem exactly. Every line you write is checked before the next one opens, and a slip is named, not just marked wrong.
Historia
The best of what the world has to teach, gathered for your exact worksheet and set out in the order that helps you learn. You do the thinking. It never hands you the answer.
The archive
Discoveries, instruments, maps, manuscripts and art, from a counting bone carved 20,000 years ago to the Webb telescope. Scattered across the world’s libraries, museums and archives.
The atlas
Every source placed by what it explains and when it was made, so the connections between them show.
One question
The question pulls out the seven pieces that explain it best, from Galileo’s ramp to a strobe photograph.
The path
You do the thinking. Historia puts the world’s best material in the order that makes it stick.
A mock demo. Worksheets, classes and scores are examples.
The coach
Plain AI help can lift practice scores and still lower exam scores: in one study, practice rose 48% and the exam fell 17% once the AI was gone. Historia is built the other way round. A hint opens only after you try, each one points, and the answer to your own problem is never shown.
Bastani et al., PNAS, 2025
Checked by code
Code works each problem exactly. Every line you write is checked before the next one opens, and a slip is named, not just marked wrong.
Try first
After three, it is back to the worked example, not a fourth hint.
Spaced review
As new versions, mixed with your other classes, so it lasts.
Learn
173 videos and simulations, each checked to exist.
Private
A model on this Mac reads your page. Code does every calculation. Nothing you add goes to an AI company.
The worksheets were written for the test by the team, typed, and run once on a MacBook: a smoke test, not an independent study.