Ten years ago there was lots of debate about whether global warming was real or not, and it often seems like that’s where we are these days when it comes to research on overall student achievement in the US. This week, a new Bruce Fuller study came out that suggests a falloff in testing gains since NCLB was implemented (Education Week). But a few weeks ago another study from the Center on Education Policy said differently. So where’s the consensus? There isn’t one. And until there is -- which may never happen -- it’s going to be mighty hard for anyone to push for, much less take, bold action towards improving schools.