For geometry students: Actively listen and watch other material online if you can't understand Barry. You have to put in less effort than you think because Barry is so punctual and, at first, intimidating, but taking a little extra time out of your day will make the class easier and the regents easily passable. For calculus students (AP included): If you sift through the 4chan references during class, Barry gives genuinely helpful advice about taking an actual exam in addition to the material, so don't pretend like what he says doesn't matter.