By World Possible
Size: 0.6 GB
PhET provides fun, free, interactive, research-based science and mathematics simulations for students from elementary school to university.
Zip File over the web
Zip File over FTP
(host: ftp.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 RACHEL modules.
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RACHEL is a World Possible project, 2023
is a 501(c)3 nonprofit organization