Unofficial list of SAO episode:volume links

Episode 1: Volume 1, Chapter 1-3
 Sidestory: Volume 8, First Day
 Episode 2: Aria in the Starless Night
 Material Editions: Continuation: Aria in the Starless Night
 Sidestory: Rondo of the Transient Sword (Not fully translated)
 Episode 3: Volume 2, Red-nosed Reindeer
 Episode 4: Volume 2, The Black Swordsman
 Episode 5-6: Volume 8, A Murder Case in the Area
 Episode 7: Volume 2, Warmth of the Heart
 Episode 8-10: Volume 1, Chapter 4-18
 Episode 11-12: Volume 2, Morning Dew Girl