<p>I know English is relatively easier to improve as they can only ask so many things. I'm looking for a resource which covers all of the stuff they check in English. Does red book cover everything? or there is some other book you have found to be useful?</p>
<p>I know Barron 36 covers most, if not all, grammar rules. Helped me boost my subscore from 27 to 33, taking official ACT practice tests. Math, reading, and science not so much.</p>
<p>If short on money, you could use the sparknotes link below:</p>
<p><a href=“SparkNotes: Today's Most Popular Study Guides”>SparkNotes: Today's Most Popular Study Guides;
<p>This was a really helpful guide for understanding some of weird grammar rules!!</p>