Besides registering for classes each semester, it is required to register for the appropriate RU or ER.
After completing a total of two RUs, all students who want to take more classes in subsequent semester(s) must register for ER. One can register for ER for more than one semester (e.g., Summer Term and Fall Term).
| Extended Residence (ER) | 20 credits maximum (EXRS) After completion of two Residence Units |
| Summer ER | 20 credits maximum (EXRS) Taken during the summer semester |
To find the call number for the kind of residence unit you want, look in the Columbia Course Directory
under Richard Slusarczyk – (Assc. Dean-Academic Affairs, GSAS) who will be listed as the “instructor” for GSAS residence units. Choose the correct semester from the drop-down menu. Find the call # for Extended Residence Unit (ER).
