He was hardly rambling. He was talking about building a foundation for long term prosperity and retraining workers to be able to compete in high tech jobs.
But he talked about like six times when it was probably only relevant once. He claimed that NCLB would "educate" workers who had lost their jobs to outsourcing. He talked about "educating" instead of addressing the minimum wage. He seemed to have no solutions beyond "educating" people no matter what the problem.
Both candidates dodged to their talking points at times.
Bush's best answers were when he did not try to fill all his alotted time but said his piece and shut up. His abortion answer is the best example.