Greetings - I am training our faculty to use the Moodle Gradebook. I am confused on the Extra Credit column. In my demo course I sign in as faculty and the aggregation is set to Weighted Mean of Grades. In my course Extra Credit column appears. When faculty set-up their gradebook using Weighted Mean of Grade, the extra-credit field does not appear. Can you please help me add the extra credit column to the faculty gradebook. I am in Moodle 1.9.9 in Windows. There are no graded items in the demo gradebook that are marked for extra credit. I am a little confused. Thank you for your help.
Extra credit does not work within a category that is set to Weighted Means of Grades. See here for an explanation why.
As to a workaround, see Itamar's explanation to another person who had a similar question.
Happy 
oodling!
I think I have it - but I need to confirm - If I set the Gradebook to Weighted Mean of Grades - with 3 Categories - I can set the Quiz Category for Weighted Mean with Extra Credit - and that will allow for the extra in the Quiz category to be applied. Correct? - Thank you - Nancy K.
Extra credit won't work in any category that is set to be as weighted. Can you attach a mock up of how you want it to be calculated? Or perhaps take a screenshot of your current categories & items page and describe how each assignment and category is suppose to count towards the final course total. I think it would be easier for me to describe the process instead of guessing at what I think you want.
Happy oodling!