General Guidelines for Homework Grading

Data Definitions
----------------

Structs:
          ; a Foo is a (make-foo ...)      2 pts
          (define-struct foo (...))        3 pts

          o -1 for a define-struct whose field order doesn't match the
            data definition
          o up to -3 for poor choices of which fields to include
            (irrelevant info, e.g.)

Itemizations:
          ; a Foo is one of                5 pts
          ; ...
          ; ...

Lists:
          ; a ListOfFoo is either        5 pts
          ; empty, or
          ; (cons Foo ListOfFoo)

Examples of Data:                          2 pts each, one example for
                                                       each data type

Templates - 5 pts
-----------------

Signature:                                 1 pt

Header:                                    1 pt

Template matches Data Definition:          3 pts


Functions  - 25 points each
---------------------------

Signature/Purpose:                          5 pts

Header:                                     5 pts

Function follows template:                  5 pts
       
       o -2 if a data definition has two cases and they write 3
         (because one case needed an inner cond)
       o -3 if they forget a recursive call that the template
         would have given them
       o -5 if there's nothing resembling the template structure in
         their code

Program Logic:                              5 pts

       o -1 for little errors (using * instead of +, e.g.)
       o -2 if they saw the logic but didn't tie things together quite
         right (using struct selectors backwards, e.g.)
       o -3 if the logic is about half right
       o -4 if the logic doesn't make much sense
       o -5 if they never got beyond the template

Test Cases:                                 5 pts

       o -1 for each untested case, up to 5 pts total.
         For the first few programs, you can look at the highlighted code
         to determine how much to take off
       o -3 if the test cases aren't executable Racket code         
       o -3 if answers aren't included with test cases
         (they should use (check-expect...), or write a descriptive
         string for images)
       o -5 for no test cases


Use of Helpers:                             5 pts
---------------
        
       o -5 if a helper is called for, but they didn't use one
       o if they use a helper, 1 point for each category under "Functions"