I'd be curious about the same thing but with world capitals, and high school math. Especially by generation, not just country.

You hear a lot of things (both positive and negative) about various countries and their education, it would be interesting to see some actual data.

One unsurprising trend I have noticed is that countries that value education more highly, put more effort (and more money) into it.

This is one of my long term goals with my site

Collect user-generated data (drawings, answers) through games and interactive pages, then measure the results and compare to open data sets or against common conceptions