Matching1

Matching Question

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This PG code shows how to set up a matching question.

• Download file: File:Matching1.txt (change the file extension from txt to pg when you save it)
• File location in NPL: FortLewis/Authoring/Templates/Misc/Matching1.pg

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PG problem file	Explanation
Problem tagging data	Problem tagging:
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "PGchoicemacros.pl", "PGgraders.pl", "unionTables.pl", ); TEXT(beginproblem());	Initialization: We use PGchoicemacros.pl to construct the list of matching object, and the custom problem grader fluid from PGgraders.pl for incremental grading.
# # Create a matching list and use popups # $ml = new_match_list(); $ml->rf_print_q(~~&pop_up_list_print_q); $ml->ra_pop_up_list([ "No answer" => "?", "A" => "A", "B" => "B", "C" => "C", "D" => "D", "E" => "E", "F" => "F", "G" => "G", "H" => "H", "I" => "I", ]); # # Add correct questions and answers # $ml->qa( "Question a?", "Answer a", "Question b?", "Answer b", "Question c?", "Answer c", "Question d?", "Answer d", "Question e?", "Answer e", "Question f?", "Answer f", ); $ml->choose(6); # # Add extra incorrect answers # $ml->extra( "Extra answer 1", "Extra answer 2", ); $ml->choose_extra(2); $ml->makeLast("None of the above");	Setup: Since we are choosing 6 questions and 2 extra answers and have 1 entry in makeLast, we must create a popup list with 9 entries A through I. For more details, see MatchingProblems from the Problem Techniques documentation.
Context()->texStrings; BEGIN_TEXT Match each question with its answer. \{ ColumnMatchTable($ml) \} END_TEXT Context()->normalStrings;	Main Text: The ColumnMatchTable() is provided by the macro file unionTables.pl.
$showPartialCorrectAnswers = 0; # # Incremental grader # install_problem_grader(~~&custom_problem_grader_fluid); $ENV{'grader_numright'} = [2,4,6]; $ENV{'grader_scores'} = [0.3,0.6,1]; $ENV{'grader_message'} = "You can earn " . "30% partial credit for 2 - 3 correct answers, and ". "60% partial credit for 4 - 5 correct answers."; # # All or nothing grader # # install_problem_grader(~~&std_problem_grader); ANS( str_cmp( $ml->ra_correct_ans ) );	Answer Evaluation: We must withhold feedback from students by setting $showPartialCorrectAnswers = 0; We use an incremental grader called custom_problem_grader_fluid. With this problem grader, you must specify the number of correct answers [2,4,6] and their corresponding scores [0.3,0.6,1] and update the grader message accordingly. The last entry in the array for grader_numright must be the total number of questions asked, and the last entry in the array for grader_scores must be 1 (otherwise nobody can earn full credit!). If you want a grader that awards full credit when all questions are correct and no credit otherwise, uncomment the standard problem grader.
@correct = @{$ml->ra_correct_ans()}; $answerstring = join(", ", @correct); Context()->texStrings; BEGIN_SOLUTION ${PAR}SOLUTION:$PAR The correct answers are $answerstring END_SOLUTION Context()->normalStrings; COMMENT('MathObject version.'); ENDDOCUMENT();	Solution: It is also possible to provide explanations for these answers. For details, see MatchingProblems from the Problem Techniques documentation.

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