If you suspect cheating is occurring, try to resist the temptation to take the exam from the student, tear it up, and send him or her out of the room. Rather, let them complete the exam, or give them another copy and let them continue on the new one, noting where you exchanged tests.
If you notice “wandering eyes,” remind the students that all work must be individual and to keep their eyes on their own paper and/or visit with the student(s) whom you suspect and quietly remind them specifically.
If students appear to be exchanging information by talking or copying, quietly record their names, where they are on the exam, and have them just as quietly, change seats.
When you see a student using notes or having notes visible, immediately, but discreetly, confiscate the material. DO NOT destroy the notes as they will be evidence in disciplinary proceedings to follow. Make a note where the student is on the exam, but let them complete the test.