http://www.nytimes.com/2012/03/28/opinion/a-dream-act-without-the-dream.html?_r=1
The Dream Act allows immigrants from other countries come to the US and serve in the military for 8 years for their citizenship or finish a higher education (Graduate high school and finish a BA in an accredited university) to get their citizenship as long as they are under the age 35, but over the age 12.
Senator Marc Rubio has been trying to find an alternative to the Dream Act by stripping down many of the requirements and limiting the actual "reward" for those would be citizens.