> I don't know exactly what you mean by "surveys," Typical education studies look at two classrooms/sets of kids, and then compare grades with and without X. I

> I don't know exactly what you mean by "surveys," Typical education studies look at two classrooms/sets of kids, and then compare grades with and without X. It's a mess. > Yeah, and I think we also need to stop pretending new is better. Agreed. I think part of the problem is centralized curriculum control. There will always be someone fighting to put in there thing or make a sale.