Simulating random variations software
Used in stage 4 of the case study - see the Teacher's guide for instructions. The software is best run online if possible.
This is the new 2017 version of the software that no longer needs Flash should work with any modern web browser on PC, Mac or tablets - and possibly on some larger-screen phones.
Installing on other computers
Unpack the .zip file and double-click on 'start.htm' to start the software.
Old versions
If you have an older machine that will not run a modern web browser, The old Flash-based versions of the software are available here.