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Ok, I going to post the source to the data structures for A+ so as to help any of you who want to help develop visualize what's going on.  Basically there are four data structure so far:

APGradeSheet
APStudent
APAssignment
APScore

- APStudent holds the firstname, lastname, and unique ID number of each student.
- APAssignment holds the name, date, and total point worth of each assignment.  Each assignment also has an array of APScores.
- APScore holds an IDNumber (for cross reference) and a point value (APPoints which is just NSNumber).
- APGradeSheet holds an array of students and assignments.

So, given a student, if you wanted his score on a particular assignment, you might do something like this:

[[myGradeSheet assignmentWithName: @"Homework 1"] scoreForStudentWithID: [myStudent IDNumber]];

That way there is no necessary need for students and grades to be in the same file, allowing for smaller file sizes if you just want to arrange a seating char or such, but also giving the flexibility to pull a students grade up from any of the four programs.

I'll try to get the source up by next Monday (that means not two days from now), as well as a bare-basics build, good enough to be called a beta.