An experiment on Israelis proved that “random events during an exam can affect not only test results, but college and career options and income for the res of a student’s life” (Ehrenfreudn). Many factors in and out of school can disturb students’ performance on the tests. Recent study has revealed that students perform poorly on standardized tests in the week after a violent crime was been committed near the school. Scientists compared results of students’ future earnings to the air pollution measurements on the day the students took the test. At the end, scientists determined that that even a slight increase in the amount of air pollution reduced students’ income by 2 percent by the time they became adults. Although this might have a small
