Genius Denied How to Stop Wasting our Brightest Young Minds
by Jan & Bob Davidson with Laura Vanderkam addresses this issue.

Your comment about not getting "political" made me smile, because that is exactly what this is all about. Political hokey-pokey; "cooking" the books so-to-speak, to make the schools look like they are improving when actually American schools are falling behind (on average) over many other nations.

Unless, or until excellence in education for all students is the objective, and not some arbitrary number that must be met in an evaluation, gifted kids will be pushed to the back of the bus. JMHO