<p>Salem,
Timely is right, coop is a good way into NASA. eppsas gave a good summary of NASA site specialties. It is easier if college coop program already has students/connections at NASA. Ask about it during college research/visits. Johnson coops have an amazing website with lots of info and 60+ bios of current coops including how they got into coop program and contact info. Studying the bios you will find several different education plans all leading to NASA. Webpage well worth visit.
<a href="http://coop.jsc.nasa.gov%5B/url%5D">http://coop.jsc.nasa.gov</a>
Most NASA sites have coop program but no website bios like Johnson. DD just received coop offer at Marshall starting next fall. One reason she picked college in Huntsville was to be close to Marshall. Worked for her.
eppsas,
Purdue also claims to have most astronauts alumni. Not sure who is correct.</p>