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That one website that lets you play with science simulations

Why it's the pick

PhET, from the University of Colorado Boulder, has 170+ research-tested simulations across physics, chemistry, biology, earth science and math that run right in the browser. All of it is free with no ads, and no account is needed; registering only unlocks teacher resources.

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2 good alternatives

oPhysics ophysics.com Physics-only GeoGebra simulations from a veteran physics teacher FreeNo signup Link checked Oct 1 Falstad Applets falstad.com Classic physics and math applets, including a circuit simulator FreeNo signup Link checked Oct 1

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