If you are having Grade Period Display issues, in example you are trying to finish putting in 3rd quarter grades and don't see anything related to 3rd quarter you will need to adjust display settings. To do so go into your gradebook and mouse over "display options" then click grade period display. From there you check the appropriate boxes you wish to see. See the attached screenshot showing what you might want to see. This setting is class dependent so it will need changed for each class you grade.