<p>ok, if you're looking into econ/IR, it is really, really not necessary to take a ton of extra science. One AP course per year IS ENOUGH. It worked for me and a bunch of my friends. If you want to take an extra, go ahead, but don't feel that you have to. It really, really, really is not necessary.</p>
<p>If you're going into a technical field then I think 5-6 sciences looks good, otherwise 3 or 4 should be plenty. I took 5 but I wish I had taken 6.</p>