All but two states have signed agreements to adopt national standards for English and math. But Texas has decided it would probably be too costly to change now, and besides, we already have standards anyway. You can read details here  about the standards and Texas' (and Alaska's) responses as to why they aren't quite on board.

To me, why wouldn't we want national standards? Think of all of the curriculum resources, textbooks, test prep guides, and more that are out there for each and every state. If we all share the same standards, we could put all of our heads and money together to create the best curricula resources possible.  Imagine how nice it would be if students that moved from out of state were right on track?  National standards just seem like one of the best ideas to hit education in decades, and it is sad that Texas may be stubborn and leave our students out. 

 The proposed standards as they currently are written can be found here.