In the Preferences section of your gradebook, you can set gradebook to display points and calculations to your students (86/100 or 86%, for example) or display letter grades (B+). If you choose to display points and calculations, you also have the option of weighting graded items relative to other graded items. For example, making three threaded discussions worth 15% of the total course grade, or 5% each. Gradebook Preference settings affect what information displays to both you and your students.
If you enable points and calculations and assign a point value to each gradable item in your course, the gradebook can calculate and display up-to-date letter and numeric grades for each student at the content item, unit, and course level. With this option enabled, students are given additional information in their gradebook, such as current course points, current course average, and current grade to date. If you apply weighting to your course assignments, the gradebook displays each student's course weighted average to date.
By default, gradebook calculates points, but not weights. You can turn automatic point calculations off from the Preferences tab under Gradebook Setup. By doing this, students will not have access to some gradebook features (like Current Grade to Date, for example). You can turn on the weighting feature from the Preferences tab.
The system saves grade data so you can turn points/weights on and off, or enable and disable gradebook, and not lose information.
To set Gradebook preferences: