Best free online resources to study for the ACT?

<p>I'm looking for any free websites or PDF files of books you think were very helpful in your preparation for the ACT. Even if you can't find a PDF of the book, if there was a book in general which you thought was helpful, please comment it. In particular I need to work on the science section primarily, and some work on the reading as well.</p>

<p>If you want free stuff, I’d recommend looking for books at the public library, especially ones with practice tests. The main book I used when I studied for the SAT had 10 practice tests and nothing else. [url=&lt;a href=“http://freerice.com/]Free”&gt;http://freerice.com/]Free</a> Rice<a href=“the%20higher%20levels”>/url</a> can help with vocabulary. </p>

<p>Act section.</p>