What I'm not sure of is how the standards have shifted, if might cause an acceleration of too many years too quickly in a changing curriculum. Like, is the shift more in name, with a few things juggled around? There are kids right now in two different classes of the same name -- old and new curriculum track, different text books and scope; the shift still very fresh and kinks are being worked out.

Here's one story that got me concerned: Early Algebra and the Common Core State Standards