Most likely you will use the Grading Tool to enter grades. The grades will appear in the Gradebook when you are done. However, if you want to enter or edit scores in the Gradebook, follow these steps.
In Course Navigation, click the Grades link.
Click the assignment cell located in the row of the student whose score you want to enter.
Type or use the arrows to enter the new score in the cell and press Return (on a MAC keyboard ) or Enter (on a PC keyboard). New scores are saved automatically.