Uhm, I'm not sure, good stats are a bit of a problem and it is a bit of an apples and oranges comparison due to the number of high school dropouts that need to get their GED first. Most non-tribal community colleges really don't go in for the GED or the vocational education that are staples of tribal efforts. Also, sadly, many of the high school "experiences" have not prepared students for higher education.
So, it really depends on what the goal is this time around. Is it a vocational certification, industry certifications (e.g. Microsoft Office Specialist), AA or AS degree, GED, or just some classes before a 4 year college. Getting to a goal is a little more important than "maximize grad rates"[1].
I guess if you have the frame of mind as "community educator" then it makes sense[2] and it really is a bit of a different world.
1) that is important, but it has to be with the students on a graduation track
2) CPR is a popular class