Pre-created standardized grading scales can be selected when creating a class. Alternatively, entirely custom scales can be created, or the parameters for existing scales can be edited.
When creating a class, options for grading scales can be seen under Grading on the Class Setup page. Click Add to create a new grading scale or calendar, or Edit to change the currently-selected scale from the drop-down list. In the Grade field, you can enter letters to match your school's grading system and the percentiles to match.