<p>The ACT is a college entrance exam like the SAT. There are some differences in test structure and contnet, but the two are essentially the same. The ACT is a lot more common in the midwest that on the coasts and some people say colleges prefer the SAT.</p>
<p>SAT II's are subject tests like biology or Latin or...whatever. <a href="http://www.collegeboard.com%5B/url%5D">http://www.collegeboard.com</a> for more detailed information on that.</p>