In some states, students are required to pass an exit exam before they can graduate from high school. If a student does not pass the exam, he/she cannot graduate. People in favor of this idea believe the exam simply asks the students to prove that they have gained the knowledge necessary to graduate from high school; people who are opposed, however, claim that such exams put too much emphasis on a single exam and don't take into consideration the student's four years of effort in the classroom. Write an essay in which you argue for or against the implementation of exit exams. Support your position with specific reasons and examples.