I think we should only be recommending MIT Scheme. Everything else has got too much going on and can become distracting, for the purposes of education.
It's almost certainly how all the button elements on your phone and computer currently work... Keyboard, homescreen, hamburger menus, links, you name it.
> theres a big difference between 99% quality and 30%.
sure
> if you treat it in a binary way where everything short of 100 falls into one "lossy" bucket you lose all the practical differences that make one encoding much better than another.
no; lossless is an inherently binary term. and I don't lose all the practical differences of better lossy encoders by understanding that; I'm not just going to start using mp3 96k because I have an understanding of lossless vs lossy encoders...