It seems the most common areas of policy activity among coordinating entities have been (1) Transitions from HS to PS, (2) Teaching quality, (3) State data systems. After that, policy areas become more scattered. But different states have framed each of these three big issues differently. For example, “transitions” in one state may take the form of improving dual enrollment programs; in another, raising high school graduation requirements; in another, creating “college-ready” HS standards with the imput of postsecondary and HS faculty, etc. etc.
This link indicates the areas in which councils had brought about policy changes by May 2008. Note that while virtually all councils call themselves “P”-16 or “P”-20, few note that they have enacted changes to early learning—either birth to 5 or pre-K/kindergarten.