Beat The System With This List Of 36 Free Educational Websites 32. JustinGuitar – Hundreds of free guitar lessons as well as some basic music theory. 33. DuoLingo – Learn a new language for free while helping to translate the web. Prev Next Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19