The Times has a long article about the extremely high level of literacy in Finland. But deep in the body the reason becomes totally obvious:

“… Lastly, children grow up watching television shows and movies (many in English) with subtitles. So they read while they watch TV.”

I guess that would have made for a very short article. I wonder if we could arrange to make watching TV require solving math problems? Maybe I should hack the TV so it only shows the Japanese, Spanish, and Chinese channels!