<p>I was a full IB'er who got into Duke so I'll try and give you some answers.</p>
<p>1) I'm really not sure how predicted scores are treated. I don't think there is much weight as long as you will pass. I wasn't even sure my school did predicted school (although I realized they have to), but I don't think they were ever sent to my colleges.</p>
<p>2) The use of the real IB score is for credit and placement. I ended up with 37 points and because I had a handful of 6's and a 7 I got two elective credits for trinity. I could've used my SAT II's for the exact same placement.</p>
<p>3) There is no magical number of points you need. I've talked to some other people (not many, like five) and they had around what I had 34-40 range.</p>
<p>4) I believe Duke wants a ranking if possible. </p>
<p>5) I'm not sure what you mean by top IB schools. Are you referring to high schools or universities? Many US schools don't know about the program. Even high level schools, which makes placement a bit tricky since there are some differences in curriculum between the general AP path and IB.</p>
<p>6) I'm sorrry but I have no idea what the abreviations are for!</p>
<p>In the end taking a full IB curriculum shows you challenged yourself academically, which is what is important. At upper tier schools you won't be getting credit since it's expected you have taken those level of classes. However at schools below and state schools you can have over a year of credit.</p>