FOLK:
http://www.music-folk.com/the-history-of-folk-music/
http://www.slideshare.net/hanhdoan/irish-jigs-and-reels-7436597
http://en.wikipedia.org/wiki/Whiskey_in_the_Jar
JAZZ:
http://www.bbc.co.uk/schools/gcsebitesize/music/popular_music/jazz1.shtml
http://www.jazzstandards.com/theory/harmony-and-form.htm
http://en.wikipedia.org/wiki/Jazz
http://www.jazzguitarlessons.net/jazz-chords.html
http://www.douggoodkin.com/Publications/pdf/jazz_rhythm.pdf
http://www.outsideshore.com/music/educational-materials/primer/jazz-fundamentals/
http://www.apassion4jazz.net/improvisation.html
BLUES:
http://www.bbc.co.uk/education/guides/ztx3b9q/revision/1
http://www.buzzle.com/articles/elements-of-blues-music.html
http://en.wikipedia.org/wiki/B.B._King
http://en.wikipedia.org/wiki/3_O'Clock_Blues
http://www.guitarcats.com/guitar-tabs/bb-king/three-o-clock-blues
ROCK:
http://rock.about.com/od/rockmusic101/a/RockHistory.htm
https://thornepalmer.wordpress.com/2011/12/29/the-10-most-used-chord-progressions-in-pop-and-rock-and-roll/
http://www.dummies.com/how-to/content/recognizing-different-rock-guitar-rhythm-styles.html
http://www.bbc.co.uk/schools/gcsebitesize/music/popular_music/rock2.shtml
http://www.queensongs.info/song-analysis/music-theory-in-nutshell/general-aesthatics-of-popular-and-rock-music
http://tabs.ultimate-guitar.com/r/rolling_stones/gimme_shelter_crd.htm
http://tabs.ultimate-guitar.com/r/rolling_stones/gimme_shelter_crd.htm
http://bobbyowsinski.blogspot.co.uk/2012/06/rolling-stones-gimme-shelter-song.html
http://www.music-folk.com/the-history-of-folk-music/
http://www.slideshare.net/hanhdoan/irish-jigs-and-reels-7436597
http://en.wikipedia.org/wiki/Whiskey_in_the_Jar
JAZZ:
http://www.bbc.co.uk/schools/gcsebitesize/music/popular_music/jazz1.shtml
http://www.jazzstandards.com/theory/harmony-and-form.htm
http://en.wikipedia.org/wiki/Jazz
http://www.jazzguitarlessons.net/jazz-chords.html
http://www.douggoodkin.com/Publications/pdf/jazz_rhythm.pdf
http://www.outsideshore.com/music/educational-materials/primer/jazz-fundamentals/
http://www.apassion4jazz.net/improvisation.html
BLUES:
http://www.bbc.co.uk/education/guides/ztx3b9q/revision/1
http://www.buzzle.com/articles/elements-of-blues-music.html
http://en.wikipedia.org/wiki/B.B._King
http://en.wikipedia.org/wiki/3_O'Clock_Blues
http://www.guitarcats.com/guitar-tabs/bb-king/three-o-clock-blues
ROCK:
http://rock.about.com/od/rockmusic101/a/RockHistory.htm
https://thornepalmer.wordpress.com/2011/12/29/the-10-most-used-chord-progressions-in-pop-and-rock-and-roll/
http://www.dummies.com/how-to/content/recognizing-different-rock-guitar-rhythm-styles.html
http://www.bbc.co.uk/schools/gcsebitesize/music/popular_music/rock2.shtml
http://www.queensongs.info/song-analysis/music-theory-in-nutshell/general-aesthatics-of-popular-and-rock-music
http://tabs.ultimate-guitar.com/r/rolling_stones/gimme_shelter_crd.htm
http://tabs.ultimate-guitar.com/r/rolling_stones/gimme_shelter_crd.htm
http://bobbyowsinski.blogspot.co.uk/2012/06/rolling-stones-gimme-shelter-song.html