Classroom Struggles

It is the middle of December and the school year is wrapping up, it is finals week. You are a 9th grade history teacher, you have 6 classes each day. After Finals are finished, you find out that 12 of the 25 kids in your last class of the day stole the answer sheet to the test and systematically passed it around to these 12 individuals. Twelve kids with exactly the same answers and all with 100% on the test. You as a teacher are faced with a very difficult situation and must make some very difficult decisions.