Grading Illustration (IMAGE) University of Mississippi Caption A University of Mississippi researcher gives the American grading system an 'F' in his new book – and said it is harmful to students. Credit Graphic by John McCustion/University of Mississippi Marketing and Communications. Usage Restrictions Credit institution and content creator. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.