Worn Dragonscale

Worn Dragonscale are the most common scales that can be obtained by skinning dragons. Dragons are usually at least level 50 and above, and usually found in instances such as Sunken Temple or Blackrock Spire, if they are not in instances they are most likely to be Elite or Rare  mobs.

See below for maps to farm Worn Dragonscale in WoW.