Generally you enter student scores as numbers. The numeric scores figure into the average calculation. If an assignment has a point value of 100, then a entering 90 calculates as 90%. If there are only 5 points for an assignment, then entering a 4 calculates as 80%. Giving a student scores of 99 on one assignment and 0 on another results in the following average.
Entering Notes with Scores
If you enter any letter (except M) the value is ignored, and essentially excused.
Even if you type in an F it still has no effect.
This is a useful feature because it allows you to enter a number, then a space and a short comment. An example could be if a student turns an assignment in late, you could enter something like 70 late. It will calculate the 70 but you still can see the comment.
Let's say a student is having issues at home or is just having an off day. If you enter text first and then the number the score will be ignored.