Comment 1 for bug 417919

Add this:

This form allows you to change the weighting of categories when calculating average scores within a worksheet.

Enter numeric values for each relevant category. The total of all values must be exactly 100.

For example, to weight exams as 60% of the grade, homework as 20% and quizzes as 20%, enter "60" next to "Exam," 20" next to "Homework" and "20" next to "quiz."