Math score, please help!

<p>So my math score, before the may 5 SAT, (going by all of the previously administered practice tests) was a 750. When I checked my results, CB said that I scored a 580. Earlier this week, I took a full practice test and score 680 and I'm going to take another one on Friday. </p>

<p>My question is, what can explain this super significant score drop? What do I have to do to prevent this from happening again on the June 4th SAT? </p>

<p>I've taken practice tests, learned that I get questions wrong because I misread. I check all of my work. I'm still afraid that I'm going to mess up again.</p>