What shall I do do add grades from database module to total score?
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Got my vote. yes" />
To avoid confusion and simplify the way that grades are entered, I went into the Grades module. At the end of the list of tabs, I noticed that there was an entry titled "Managing Graded Events." You can create a new graded event here without needing to add another task on your main page. You can then manually enter the grades there, though it would be nice to be able to use the ratings I have already entered.