Google Mapping Math and Reading Test Scores

Here's a Google Maps View of States with Math and Reading Tests which are more difficult/easy compared to Nationally Administered Tests.

For example in Math Tests: Missouri had 16% of the students scoring proficient or better in State Administered tests compared with 26% of the students who scored proficient or better in nationally administered tests.

Now compare Missouri with Tennessee:
In Tennessee 87% of the students scored proficient or better in state administered Tests compared with 21% of the students who scored better or proficient in Nationally Administered Tests.

(Source: Time Magazine)