Carleton is launching a new automated Graduate Admissions and Funding Applications System, which means the application process for graduate studies for the Fall 2013 semester will be slightly different than preceding semesters. More information for prospective students can be found on this handy How To Apply page. Just figure out when you want to apply for admission, read what is required for that admission period, and follow the steps!
Please note that this is only relevant to graduate studies, so undergraduates need not worry.