If you would like to reserve classrooms, conference rooms, or breakout rooms, please check room availability and then send an e-mail request to Instructional Support Services (ISS): ssw-iss@columbia.edu. NOTE: Instructors who would like to make a one-time classroom switch, combine classes, or extend class time should e-mail Instructional Support Services (ISS) at ssw-iss@columbia.edu. ISS will coordinate the changes, after which Room Reservations will update EMS.