Scaffolding1

Sequentially Revealed (Scaffolded) Problems

Click to enlarge

This PG code shows how to create multi-part questions that hide from students parts that have not yet been answered correct.

PG problem file	Explanation
Problem tagging data	Problem tagging:
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "compoundProblem5.pl", "PGcourse.pl", ); TEXT(beginproblem()); $showPartialCorrectAnswers = 1; $scaffold = Scaffold(); INITIALIZE_SCAFFOLD('$scaffold'); $isInstructor = 0; # = 0 when students use it TEXT(MODES( HTML=>'Clicking on a section opens it provided that you have answered previous sections correctly.', TeX=>''));	Initialization: We initialize the scaffolding with the name `$scaffold`. Set `$isInstructor = 0;` when the problem is available to students, or set to 1 when debugging. Alternatively, we could set `$isInstructor = ($envir{effectivePermissionLevel} >=` `$envir{ALWAYS_SHOW_SOLUTION_PERMISSION_LEVEL});` to ensure that only users that always have permission to show correct answers can open all of the sections of the scaffolding without needing to enter correct answers.
Context("Numeric"); $answer = Compute("1");	Setup:
Context()->texStrings; BEGIN_TEXT Question text $BR $BR Answer = \{ ans_rule(20) \} \{ AnswerFormatHelp("formulas") \} END_TEXT Context()->normalStrings;	Main Text:
$showPartialCorrectAnswers = 1; ANS( $answer->cmp() );	Answer Evaluation:
Context()->texStrings; BEGIN_SOLUTION ${PAR}SOLUTION:${PAR} Solution explanation goes here. END_SOLUTION Context()->normalStrings; COMMENT('MathObject version.'); ENDDOCUMENT();	Solution: