Scan & Scram

Something that university/college students do in order to get the attendance marks for lectures/tutorials/seminars/lessons that they never attended. They can the attendance scanner outside the room their lesson is in with their student ID, the system marks them as present and they leave and go home or somewhere else other than the lesson. Smart teachers/lecturers will not allow this to happen and will manually change it to absent once they notice the student isn't there.

Scram is an informal word for leave or go away.