<p>Depends on what you’re interested in. I’m pretty sure CTY, Brown, Harvard, EPGY, Duke, etc. take rising sophomores, but none are terribly prestigious (high acceptance rates and tuition); they’re good to explore subjects with, though. Community college classes are also your friends, if you’re into something cheaper or closer to home.</p>
<p>Science research programs generally only take older applicants (rising and graduating seniors), but there might be ones (especially local or regional ones) that I haven’t heard of that take rising sophs; you might also be able to persuade a local professor to let you work as a lab assistant or intern for the summer.</p>