** Using WeBWorK **

Thanks for looking at this, Glenn.

In the first directory (.../webwork2/htdocs), the npm ci command runs to completion and shows no errors.

In the second one (.../pg/htdocs), the npm ci command starts and then hangs. It seems like that command normally offers play-by-play comments on what it is doing. The last thing that worked was something like

reify: jsxgraph: timing reifyNode:node_modules/caniuse-lite Completed in 2843ms

After that I get cryptic log messages with timestamps. One says, "INFO: task iou-sqp-18377:18385 blocked for more than 245 seconds." The next line says what kernel I have and the third one says what to do to disable the message. The quoted message comes back from time to time, reporting a longer blocking duration every time.

... time passes ...

I have tried a number of variations on the approach above, without success. The package manager hangs every time. Doing the same steps lead to the same results in spite of the following modified approaches ...

• saying "systemctl stop webwork2" and "systemctl stop webwork2-job-queue" before giving the "npm ci" command,
• compounding the above commands with a "rm -rf node_modules" in the working directory, and then saying "npm install",
• doing all of the above and additionally using the "--no-progress" option on the "npm install" command, and
  
• Installing yarn and trying "yarn install" instead of "npm install" [this one also stalls and says that iou-sqp is blocking].

DOCUMENT();

loadMacros(

  "PGstandard.pl",

  "MathObjects.pl",

  "PGML.pl",

  "parserGraphTool.pl",

  "contextInequalities.pl"

);

##############################################

# Set-up

Context("Inequalities-Only");

#--part a------------------------------

$na1 = 1.5;

$na2 = random(1,4);

$a1 = Inequality("x > $na1");

$a2 = Inequality("x < $na2");

$ans_a = Inequality("$na1 < x < $na2");

$numberLine_a = GraphTool("{interval, ($na1,$na2)}")->with(

    availableTools =>

        [ 'IntervalTool', 'IncludeExcludePointTool' ],

    numberLine     => 1,

    bBox           => [ -8, 8 ],

    ticksDistanceX => 1,

    minorTicksX    => 4,

    useBracketEnds => 0

);

#######################################

# Main text

BEGIN_PGML

Write the pair of simple statements as a compound statement and illustrate the answer on a number line.

    *Note:* _For [`<`], [`>`], [`\leq`], [`\geq`], [`=`], or [`\neq`]. Enter these as *<*, *>*, *<=*, *>=*, *=*, and *!=*._  

[` [$a1], [$a2] `]  

     Answer: [_]{$ans_a}    [_]{$numberLine_a}

END_PGML

ENDDOCUMENT();        

Hello dear community,

I am trying for the following setup. I want a student to answer two multiple choice questions to achieve two points. The questions are drawn from an array of five different multiple choice questions, randomly. In case she is successful, nothing else happens due to passing. In case he fails at both questions, failure is complete. But in case one questions is correct and the other not, she is to get one additional chance and another new multiple choice is drawn out of the array. So I want to genrate a problem where a new problem or a new problem part appears when out of the initial multiple choice questions, exactly one is false.

Is that even possible? I was thinking of scaffold or compoundProblem5 and drew three out of five initially. But I could not get to the point where I have access to the students achieved grading points to set a conditional. I am linked to Moodle and also thought of a condition in Moodle for the exactly one point scenario. But that the new link would be visible when one question has been answered correctly but the second was not tried already. Apart from that the new link would aim at new set where I could not set the same seed as in the first one, could I? I would also go with a gateway quiz if that would suit my setup.

I have though about that.  I have several problems that ask the student to solve a linear inequality or compound linear inequality, and then graph it.  The first part is a standard MathObject interval answer, but for the graph I use a radio multiple choice type answer.  It would certainly be nicer to have the students construct the number line graph instead. 

In addition, these problems are scaffold problems where the second graph part is not visible until after the first part is correct.  The reason for this is because the multiple choice graphs give away what the solutions for the equality are.  In addition, I have to have alternate version of the problems on quizzes that do not ask the graph part, because the scaffold is open and again the graph gives information away for working the first part.  If the student were constructing the graph from scratch, this wouldn't be an issue.

I actually use JSXGraph for the graphs in the multiple choice radio answers, but they are static graphs.  Sp JSXGraph is certainly capable of making these sorts of graphs.  However, the graphTool javascript would need considerable retooling to achieve this, and that would be difficult to do without messing up the two dimensional graphing capabilities.  It might be easier to make another macro and javascript to handle this.

Here is a screenshot of a graph from one of these problems:

I'm just starting the process of revising old problems to use scaffold.pl (rather than compoundProblem.pl).  But it seems that scaffold isn't working as advertised: later parts are open whether or not earlier parts have been completed successfully.  I saw a post here from a few years ago,

https://webwork.maa.org/moodle/mod/forum/discuss.php?d=4004,

with the same complaint, for which the problem turned out to be registering the answers outside the section; but that doesn't seem to be the issue with me. 

Here's a MWE:

DOCUMENT();        

loadMacros(

  "PG.pl",

  "PGbasicmacros.pl",

  "PGanswermacros.pl",

  "scaffold.pl"

);

TEXT(&beginproblem);

Scaffold::Begin(can_open => "when_previous_correct");

Section::Begin("Part 1");

BEGIN_TEXT

    1+1=\{ans_rule(4)\}

END_TEXT

ANS(std_num_cmp(2) );

Section::End();

Section::Begin("Part 2");

BEGIN_TEXT

    2+2=\{ans_rule(4)\}

END_TEXT

ANS( std_num_cmp(4) );

Section::End();

Scaffold::End();

ENDDOCUMENT();       

Just tried gateway/quiz for the first time, and there scoring anomalies. Now this may just be because two of the four problems used the deprecated compoundproblem.pl macro, but I'm not sure that explains everything.  Here are the previous answers and scores for one student.

previous answers:

score:

Aren't these blatantly contradictory?  The previous entries show the student getting everything correct, while the score is 2.75/4.