When selecting Points vs. Percent as the grade type for an assignment, there should be some explanation of the difference. As I have come to find out, there is NO difference in how the grade is calculated in the gradebook, only in how it displays in the gradebook.

This has caused much confusion. When grading by percents, each assignment carries the same weight and you use a simple average calculation to find the category grade. When grading by points, you add the total earned points and divide by total possible points to find the category grade.
Example:
50/400 = 12.5%
100/100 = 100%
100/100 = 100%
100/100 = 100%
100/100 = 100%
100/100 = 100%

Using the points method, the category grade would be a 61.1% (550 / 900 = .611111)
Using the percent method, the category grade would be an 85.4% (512.5 / 600 = .8541666)

As I tested this in the gradebook, both ways yeilded a category grade of 61.1%.

I bleieve that most teachers would expect different results.