<p>Yes, there are +/- grades, also. See this information on grade points including the calculation for .5 classes:</p>
<p>Also, be aware professors are not infallible. My D received a lower grade in a class than she expected. About two weeks later her professor e-mailed her saying there was a calculation error in the computer generated worksheet used for final grades and a correction would be submitted to the registrar. So, if you receive a grade that is lower than you expect definitely contact your professor as mistakes have happened.</p>