I got asked this question by someone who wanted a list of the 20 highest and 20 lowest schools for free and reduced lunch students. (I couldn't just find this information at the district's website so I compiled the list from OSPI data for 2012-2013.)
I wasn't especially surprised at who made the list nor where these schools are located.
I was surprised at who is number one overall (meaning all schools) for highest numbers - bet you can't guess (no peeking first).
There was a three-way tie for lowest. Again, without looking, take a guess.