Maine: Moving from Tradition, SAD15 Pilots Standards-Based Learning

Can anyone answer this question - If a student is in 6th grade, but working on a 5th grade standard for math, do they take the 5th grade level NECAP? How does a teacher manage a "spiraling" curriculum with the RISC model? Is the RISC model anything like the controversial Outcomes Based Education model in Western Australia? A quick Google search on this will bring up many Western Austraila articles on OBE.