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World Possible
PhET Interactive Simulations (en) - Kolibri

English 0.4 GB (CC BY 4.0)
The PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations that engage students through an intuitive, game-like environment where students learn through exploration and discovery.
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Zip File over the web
Zip File over FTP (host: dev.worldpossible.org user/pass: anonymous)
Copy & paste the above command to any Unix-based system to begin download. Rsync can pick up where it left off and only downloads changes. It's the most efficient way to stay up-to-date with OER2Go modules.
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