Originally Posted by BlastRadius
The drive-side is reverse threaded with English BBs and the non-drive-side is standard right-hand thread.
With pedals, the drive-side is standard right-hand threaded and the non-drive-side is reverse threaded.
BlastRadius is right about the thread directions. I recently changed the BB out on my Raleigh. You really might want to use a breaker bar of some sort; they can be a pain to loosen.