Enable outcomes globally (enableoutcomes). Create an outcome at the site level. Assign the outcome to the course. Create an Assignment (without enabling the outcome). Click Course Administration > Grades > Categories and Items > Full View. Notice Aggregation is set at default to "Simple weighted mean of grades" Select drop down menu for Aggregation, change to "Weighted mean of grades" Save changes Notice weight default shows up as 1.0 as intended . Return to your course, and add another assignment enabling the outcome. Save and Return to course Click Course Administration > Grades > Categories and Items > Full View. Make sure the weight of recently added assignment is 1.0 and the outcome is 1.0 as well . Return to the course and create a new workshop. Click Course Administration > Grades > Categories and Items > Full View. Make sure the weight of recently added workshop items is 1.0 . Return to the course and create a new workshop (enabling outcomes). Click Course Administration > Grades > Categories and Items > Full View. Make sure the weight of recently added workshop items is 1.0 and the outcome is 1.0 as well . Set a different weight to the created grade items and Save changes. Return to the course and update the information of the same assignments you changed the grade. Update the information (description, title...) of these course module and save. Go to Course Administration > Grades > Categories and Items > Full View. Make sure the weight of recently changed assignments was not changed to 1 and the grades was not changed. .