This is kind of neat: create a new educational 'use' and drag it onto a matrix. Even better, use the 'dragster' Flash tool that made this possible to create other drag and drop exercises. (It doesn't work in Flash 7 though - I know, Flash 7 is so 2006... why can Ubuntu update totally obscure software I never use while leaving my Flash plugin to become more and more obsolete?).
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] [![Image from the website](https://downes.ca//files/images/post_44145.jpg)