[r_klancer]

Fun! This is the kind of thing I got back into programming for around 2010. Just to toot my own (and my former employer's) horn, I worked on a bunch of the underlying models behind the Concord Consortium activities here: https://learn.concord.org/

They're aimed more at middle and high school, are "curriculum aligned" and developed into classroom-ready form by professional educators, and then Concord researches how well they work in actual classrooms.

We had been using a Java app (and applet) called Molecular Workbench for some of these, but in 2012 we got a Google.org grant to reimplement the same concept but natively running in browsers.

[kragen]

what do the models do, and how are they similar to or different from falstad's applets?