Interactive learning, no background needed
Some things you understand
only by doing them.
Lysen builds one site per subject: things to click, predict, sort and get wrong, written for people who were never given the technical version. Pick where you want to start.
Subjects
Where do you want to start?
One is open today. The others are marked for what they are. They are in the works, not hidden behind a signup, and each one appears here as a link when there is something real to press.
AI
What AI actually is, how generative AI works, where it fails, and how to use it wisely. No maths, and no jargon before the idea it names.
- 5 interactive sections
In development
Machine learning
A visual lab where regression, neural networks and transformers are things you can drag, break and watch adjust, rather than equations to take on faith.
Planned
Studying
How learning actually sticks, and which study techniques survive contact with the evidence, including the popular ones that don’t.
Planned
Psychology
How minds work, with the replication status noted on every claim. A lot of famous psychology did not survive being repeated, and you deserve to know which.
What every subject here has in common
Free, and no account
Nothing to sign up for and nothing to buy. What you have read and played is remembered in your own browser, so it is yours to clear.
Something to press on every page
Predict, sort, choose, get it wrong, see why. Explanations exist to make sense of what you just did, not the other way round.
Honest about its own limits
Claims that go stale carry the date they were last checked, and a section that isn’t built yet says so instead of pretending.