http://sparkaction.org/node/27128
There are a few high schools in Washington State working with Antioch University (Seattle) to offer high school students an Early College program to complete concurrent to their high school education. The above article is dated back to 2004, but comments on the affordances of such a program for native youth: family and community involvement, culturally relevant curricula, higher graduation rates and lower dropout rates, and higher grade point averages, (which is remarkable considering the challenging college level courses).