Point System- How do they know?

[Katie <dixiehnsnluver@yahoo.com>]

No: HPFGUIDX 50561

 Okay, I've looked through the information sites, and though I've 
found comments on how the points are quite low considering the 
projected amount of students that attend Hogwarts, I haven't found 
any speculation as to how the points are added up. Is there a spell 
that keeps count of every point addition and subtraction that goes 
on within the school boundaries or do the teachers have the 
responsibility of keeping up with what the give and take? Does 
anyone have a point of view on this? Also, if in my perusal of the 
FAQ I missed the answer to this pondering, kindly point me in the 
direction of the post and I will leave without bothering you 
further. :)

KtDiD