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Convenince labels added to the top of each file to assist in creating
index-type help files for things like the XML editor screen (where
there's nothing to hook help to).

    1: \label{String_Response_Problems}
    2: 
    3: \textbf{\index{String Response}String Response} problems are problems in
    4: which the student submits a string of characters for the answer. Examples
    5: of string response questions are vocabulary tests, short answer and entering
    6: chemical formulas.
    7: 
    8: Note that it is easy to abuse String Response problems. For instance, consider
    9: the question {}``Who wrote 'Huckleberry Finn'?'' If you tell the system
   10: the answer is {}``Mark Twain'', and a student answers {}``Twain'', the
   11: system will mark it wrong. If they answer {}``Samuel Clements'', then the
   12: student will definitely get it wrong. There is some room for flexibility
   13: in the string processing, but it can be difficult to get it all right. Before
   14: you use a String Response problem, be sure you can easily characterize correct
   15: answers.
   16:
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