Canada, based on their point system, provides advantages for potential immigrants if they have studied in Canada previously.
However, there is no advantage at all in the U.S. - In other word, the U.S. does not care if you are a student in the U.S. before. at all. In the point of view of the U.S., students has nothing to do with immigration.
2011-03-04 02:30:36 補充:
It is not a easy job - it takes a while - simply studying there will not do the job.