How Can I Improve This Score?

Test Preparation SAT Preparation
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<p>For some reason the October 2005 PSAT Writing Skills section is more difficult than CollegeBoard's Official Guide to SAT's Writing section.</p>

<p>I am scoring in the range of 680-740s in the SAT Writing section,
but on the PSAT, I am scoring in the range of 630 - 670.</p>

<p>What could be the reason for this?</p>