SAT improvement help needed

<p>Hi everyone,</p>

<p>I'm hoping to get into a top tier schools, and I feel like my SAT scores are kinda holding me back.</p>

<p>First go around, I studied a little bit?
Math: 630
Reading: 680
Writing: 710</p>

<p>Second go around, I took a course [didnt teach me anything I didnt already know]
Math: 680
Reading: 690
Writing: 660</p>

<p>I know my writing score went down, but I'm not really worried about that. I just wanna get each subscore into the 700s. The CR.. I have no idea what to really study for? I improved but it wasnt because of practice but merely based on the test itself. I got all the sentence completions right, and 8 of the passage based ones wrong. If I want to get into the 700s for CR, should I just leave them blank rather than simply guess? I figured it was a waste leaving them blank. How many could I afford to get wrong or leave blank to get 700-750.?</p>

<p>The second time around, I thought I did much better on the math section... which I did improve, but I couldve sworn that I got in the 700s at least. I got 6 wrong and omited 1. How many could i get wrong or omit to get 700-750?</p>