Numbers: 27 State New Ed Reform Groups In 5 Years
Over the past five years, national K-12 advocacy organizations created 27 state affiliates, according to a May 2014 report quoted in EdWeek (Leadership, Political Winds Buffet Education Advocacy Groups).
That's up from 8 such groups created in the decade 1997-2007.
You can read the report here.
I've asked them for updated figures, since some of the affiliates have closed up shop and others have opened since then.