[metmom]

Comparing within our country, which reduces other factors such as work ethic and cultural considerations, is going to be more accurate.

So why, if evolution is the supposed to be a panacea for the science education woes of our country, is science education continuing to deteriorate in public schools in light of the fact that only evolution is taught there, while homeschoolers, who teach creation and ID in addition to evolution, do better?

[tacticalogic]

Comparing within our country, which reduces other factors such as work ethic and cultural considerations, is going to be more accurate.

And show us how teaching evolution only in public schools has improved our science ranking and educational standing in the world.

There's the goal post. You put it there. Comparing within our country won't give you any information about our science ranking and educational standing compared to the rest of the world.