Positive thinking helps with stress management and can even improve your health. ... Indeed, some studies show that personality traits such as optimism and pessimism can affect many areas of your health and well-being. The positive thinking that usually comes with optimism is a key part of effective stress management.
when the grade that you already have were to be put on your report card it would be rounded to the nearest whole number, that being a 70%. so really any grade would help.