Students are supposed to sit with their hands folded and their eyes tracking their teacher? Sorry, but this isn't how children learn.
You want to raise scores? Flood the schools with books. Give the kids plenty of time for independent reading. Encourage writing by having the students write about what's important to them. Teach subjects with hands-on projects. Reward creativity in both teachers and students. Essentially, replicate the enriched environments that produce the high-achieving children now.