Current Sternies? classe??lectures???

<p>Hi! I was admitted rd 2013...I was really curious about the way the letures are conducted at stern...Are there a lot of debates/discussions and is that what determines your gpa? Or is mainly the professor doing the talking and we listen?..Also, when do we get to choose our majors? Is it gpa wise or are we free to choose whatever we want to do?</p>