Prof.Joo said American education can't be explaned without 'standard' and 'accountability'.

'No Child Left Behind' that has been began since 1992 is the policy reflected these.

The World Newspaper reserved comment as ‘No Child Left Behind legislation was well intentioned, but its emphasis on testing has had unintended consequence'.

I think this policy makes the students' intellectual standard lower and doesn't be considered high mental that can be grown if they have any chance.

I'd like to know how we can combine or control 'accountability' and 'excellence'.

I've seen the books or papers that referred to the matter as if it were different meaning totally. So, do we say American education bring to focus exclusively school responsibility rather than various talents students have? It seems that there is no proper principle in American education.