Take a Quiz on Style

The British news publication The Economist makes public its style guide and offers a quiz based on it. What's really great about this quiz is that the Answers page not only explains why the correct response is preferred, but it also refers you to a section of the style guide (with a direct link) for further study. Here's a sample of the questions. Pick the most correct of the three following sentences:

If Mickey Mouse were president, he would introduce such a policy.
If Ted Kennedy became president, he will introduce such a policy.
If Ralph Nader becomes president, he would introduce such a policy.

All I can think is that if Mickey Mouse were president, we all might be a lot better off! Incidentally, the website also provides various research tools such as "Backgrounders", brief explanations of topics that I would depend on over any wiki descriptions you might find on the web. I looked up the Kurds (hoping to learn something of their ways) and found 25 million stateless souls trapped in the Middle East conflicts.