<p>How carefully do you have to fill them in? This might sound ridiculous, but I'm one of those people who are paranoid and meticulously fill in each circle. Then, I run out of time.</p>
<p>Can you just scribble a blob of graphite in the middle of the circle, and the machine will read that? I currently go right up to the line and make sure not to go beyond it, which adds up to a lot of time for sixty-three questions.</p>
<p>I asked some people who know about scantrons, and I was told that it's a waste of time to make "perfect" bubbles. As long as you completely cover the letter in the middle of the circle, you're fine. Don't worry if you're a little short or over. I think that anhtimmy's strategy is dangerous; it could really backfire if you have a strict proctor who won't allow you to touch the answer sheet after the test.</p>
<p>supposedlyy, according to the sat admission thing, it says no mechanical pencils anyway. h sucks for me, i guess, since i'm one of those neat freaks who has to sharpen her pencil every 5 minutes to write an essay. x_X</p>
<p>^I hear you. For the essay I bring a bunch of sharpened #2's (there is no limit as to how many you can have on your desk). For the rest of the test I always use a mechanical pencil to write with and a dull #2 to "bubble in". Only once in my umpteen takes a proctor enforced a ban on mechanical pencils; she was just getting back at me for voicing an objection over her timing mistake.
No need to be obsessed with precision when filling in bubbles.</p>
<p>Actually, I used a mechanical pencil on the SAT II Math Lvl 2, SAT I (only for writing the essay though), and PLAN and nothing bad has ever happened.</p>