Live site can be found at andrew.hedges.name/es6
I put the site together for use in a unit I taught at PDX Code Guild where I taught in 2016.
I’d love feedback on it, especially on the content of the lessons. Feel free to file pull requests or just drop me a note (you can find my email address on my homepage).
The site is offered under a Creative Commons “Attribution-NonCommercial-ShareAlike” license. Follow that link for more details.