Success adds up for D.C. schools' math program - washingtonpost.com

Success adds up for D.C. schools' math program - washingtonpost.com - Interesting article on Everyday Math. I was just talking with an elementary teacher and potential doctoral student about the "spiral" curriculum of Everyday Math and how much it requires trust in one's colleagues to pick up things in the next grade and provide the appropriate foundation from the previous grade. I wonder how those teachers who "opt out" handle that trust issue, or if whole schools are opting out.