what about during the summer? do you not work then either? personally, i worked all through college. i think it is important to let schools see you can balance different tasks with success. now, if you are making good use of your time outside of school doing other organized activities (read: activities you can list on an application) on a fairly regular basis then that might do it. i think it is important to be doing something meaningful with your summers, whether that is working or taking classes or whatever.