For semester-long or first-half (7 week) elective courses, you may pre-enroll in, or add or drop Johnson classes through your Student Center system during the normal appointment dates and times (see the Johnson Academic Calendar). Johnson also offers 7 week classes occurring during the second half of each semester (these run mid-October through December for Fall term classes and mid-March through May for Spring term classes); you can add or drop these classes during a short period before these classes begin.