http://www.scouting.org/factsheets/02-516.html

requirements:
http://www.eaglescout.org/

Eagle is as high as it gets - takes a minimum of about 4 years of active work, realistically, more.

takes some hardwork and dedication to get there. Statistically, 1 out of every 50 scouts will earn the rank of Eagle, the highest scout rank.

rank order goes : Tenderfoot, Second Class, First Class, Star, Life, and Eagle