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Simulations you can meddle with: orbits, evolution, chemistry, cellular automata. Understanding through interference rather than through reading.
15 sites
Ben Eater's flocking simulation with the three rules exposed as sliders, so you can break the flock deliberately.
A stocked chemistry bench in the browser where you can mix reagents and get it badly wrong at no cost.
Interactive models of what complexity science likes best — epidemics, flocking, synchronisation, forest fires.
Home of Conway's Game of Life — pattern archive, wiki and a board for setting your own cells running.
An explorable on how ideas and riots spread through a social network, with the contagion thresholds under your control.
A graphing calculator good enough that people make art with it — type a function and drag its parameters about.
Build a circuit and watch current move through it as coloured dots, with an oscilloscope available on any node.
A toy about synchronisation — a few hundred blinking dots that agree on a rhythm with no conductor anywhere.
A genetic algorithm evolves two-dimensional cars across rough terrain while you watch generations fail forward.
Geometry, algebra and calculus tools in one place, plus a huge shared library of constructions others have built.
Draw circles and arrows, press play, and your scribble runs as a working feedback-loop simulation.
Search any molecule and spin its three-dimensional structure, with spectra and crystal data alongside it.
Colorado's library of physics, chemistry and maths simulations, used in classrooms everywhere and free to meddle with.
Write a Turing machine in a few lines and watch the tape head shuffle back and forth carrying it out.
Thousands of interactive maths and science notebooks contributed over two decades, each one a single slider-driven idea.
One button, one detour. Press it as often as you like.