<p>I find writing is the easiest area to get students to improve their scores in followed by math. For CR, I can have students study vocabulary. The part where they answer questions on passages seems hardest to tutor and get results. Similarly for the science and reading portions of the ACT. Are there approaches that are effective for those sections? Are there good materials or books to use? Most of the books give some general advice and then have passages and sample questions. Are there resources with drills for CR?</p>