To meet acceleration needs, tracking with fluid track changes, remediation, common core, and existing materials, then I think they need to consider a radical departure.

Teach to One:
http://www.newclassrooms.org/reimagine.html

This program is really impressive, the results are particularly powerful for kids striving to succeed. Without a change from the traditional linear classroom, it would be hard to move out of ruts.

Also, they could be looking at digital textbooks (aka techbooks) as the good ones will be dynamically maintained, allow for self-assessment, compacting, additional practice, and still meet the common core thinking needs.

If none of that, then they could implement a math learner model they are working towards that splits curriculum into internally consistent dependency tracks so that a kid can move along more than one track concurrently.

In terms of the direct experience with compacting question, DS8 doesn't have experience with middle school math and likely never will as he's moving onto high school algebra.