Nivine Megahed writes: Colleges and universities across the country are seeing a significant increase in the number of students the U.S. Department of Education selects for verification of their financial aid applications. In the past, about 30 percent of students who filled out the Free Application for Federal Student Aid were selected for verification that required students to provide evidence that the information they submitted was accurate. This year, the Education Department flagged an astounding 75 percent of National Louis University’s freshman class of 640 students, and that has taken a harmful toll on many of them.