====== Subject Classes -Entering Grades ======

When entering grades enter 0 (the number) for a zero grade or abs for absent.
Leaving a grade field blank is equivalent to entering an absent.

An ABS will not affect a student's average.
A zero will lower a students average.

For example
^ Grade 1 ^ Grade 2 ^ Grade 3 ^ Average ^
|  90     |  90     |  ABS    |  90|
|  90     |  90     |  0      |  60|
|  90     |  0      |  ABS    |  45|

===== Tips =====

  * When entering grades you only need to press "a" the field will change to "abs" automatically
  * You can press TABS to move to the next field
  * When entering grades to completely remove an item (no enter abs or 0) type "n" the field will change to "nil"