With study abroad programs throughout Argentina, there is likely a semester program at a university to suit you. Choose a study abroad program in Mendoza, the wine country of Argentina, or a study abroad program in the lake district and ski and outdoor sports capital of Argentina - Bariloche. Or, if it's the big city urban adventure your after, then perhaps a study abroad program in Buenos Aires is what you're looking for.
A wide variety of subjects, in both English or Spanish, are available. See the links above for more details on the individual semester programs.