<p>Nspeds, not that I know of. There aren't very many classes offered anyway -- just a few intro courses for people who need to retake. Harvard does offer lots of summer classes through its extension school, if you're looking for summer classes in Cambridge.</p>
<p>Tangents, I know the MIT summer reserach program is open only to college upperclassmen. I'm not sure about the REUs, although I've heard those are very competitive. The NIH internships are open (I believe) to college students of all levels, although when I worked there the summer after my freshman year, I was the youngest one in my lab. They will train you -- it was my first lab job. :)</p>