<p>Passion is much more important than grades. It's been said many times, but it's worth repeating. And it's not about 'passion for going to MIT', it's about 'passion for doing what you love to do' - presumably something science-related. So don't freak out about a B+. Grades are like SATs - grades will not be what get you in to MIT. You can have perfect grades all through high school and still get rejected.</p>