Question types: Drag and Drop Organic Chemistry Nomenclature

Maintained by Picture of Carl LeBlondCarl LeBlond
Students construct the names of organic molecules by dragging and dropping.
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This software is no longer maintained and has been superseded by the OpenOChem LTI assessment system.

Learning organic chemistry nomenclature is not extremely difficult and most students acquire the basics quickly.  Unfortunately a good percentage of students mangle the format, punctuation and/or spelling, losing valuable points on exams and quizzes.  With this in mind a new question type was designed to reinforce IUPAC nomenclature with an emphasis on formatting and punctuation.  Students must construct names by dragging and dropping parent chains, prefixes, suffixes and punctuation symbols to form the correct name.


This plugin adopts the same license that Moodle does.


This plugin was developed at the Indiana University of Pennsylvania.


This plugin is part of set EasyOChem.


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Picture of Carl LeBlond
Carl LeBlond (Lead maintainer)
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  • Anthony Borrow
    Fri, Mar 7, 2014, 1:16 PM
    p.s. - please have a look at - we will want to figure out how you want to report issues (either with Github's issues or Moodle Tracker). Let us know your preference and we can move forward from there. Peace - Anthony
  • Picture of Carl LeBlond
    Fri, Mar 7, 2014, 9:01 PM
    Anthony - No problem on delay, I figure you all were very busy. I changed the repo name as you requested. I tested install and qtype in Moodle 2.3 and 2.6 thus I specified 2.3, 2.4, 2.5 and 2.6 as required Moodle versions. I'll use github for issues, and I added the issue link on description page. Cheers - Carl
  • Anthony Borrow
    Mon, Mar 24, 2014, 1:11 PM
    Carl - Many thanks for providing the URLs. One small detail I noticed was that in the renderer.php file there is a call to var_dump that you probably intended to either remove or comment out. Before approving, let's get that cleaned up.

    I would also recommend looking at the copyrights which reference many others. When you modify the file, you become the copyright holder of the modified file but can reference the original.

    Otherwise, the plugin installs and functions fine so once these issues are addressed I think we can move forward with approval. Peace - Anthony
  • Picture of Carl LeBlond
    Mon, Mar 24, 2014, 11:35 PM
    Anthony - I fixed the var_dump in the renderer and corrected the copyright info. I also fixed some older javascript and replaced with YUI3 calls and cleaned some other things up. These changes are available on the github version. Should I also upload a new version on
  • Picture of Carl LeBlond
    Tue, Mar 25, 2014, 3:46 AM
    I added the new github version to
  • Anthony Borrow
    Tue, Mar 25, 2014, 12:59 PM
    Thanks for patching things up a bit and uploading the new version. I have installed the new version and all looks good. I am going to go ahead and approve this entry. Peace - Anthony
  • Picture of Carl LeBlond
    Wed, Mar 26, 2014, 1:13 AM
    Anthony - I fixed the language string you mentioned and the copyright issue with the few files. All is good now and I uploaded new version (2014032500). Thanks!
  • B.Havel
    Fri, Apr 4, 2014, 7:36 PM
    Hi, it looks good, but the file dragable.html is unfortunately only in English and can not change the language. University teaches in Czech and in English. Bohus
  • Picture of Carl LeBlond
    Fri, Apr 4, 2014, 9:52 PM
    Bohumil - Thanks! If you could send me the translations, I'll do a rewrite to include the language strings.
  • Picture of Carl LeBlond
    Sat, Apr 12, 2014, 9:45 PM
    The latest version 2014041200 allows language changes.
  • Picture of Zakarya Guenda
    Mon, May 21, 2018, 4:37 AM
    p.s. - please have a look at - we will want to figure out how you want to report issues (either with Github's issues or Moodle Tracker). Let us know your preference and we can move forward from there. Peace - Anthony
    my website
  • Picture of Yelena Hopper
    Wed, Nov 28, 2018, 6:06 PM
    Yes, that’s right, most of the students facing problem format, spelling and even missed a lot of point on an exam. My students also faced a similar problem in there study. But, right now I solved their problem. Recently, I write a blog about “9 best plugins for school days” which I will publish on and share it on PenMyPaper.
    Mon, Jan 21, 2019, 9:08 PM
    Very informative and nice post with the also great blog with pieces of information. Thanks for sharing and keep it up.
    Regard, Assignment Writing Help
  • Picture of Fernanda R.
    Fri, Jul 10, 2020, 9:13 PM
    Hi, Is there any plans to update this plugin to version 3.8 / 3.9 / 4.0?
  • Picture of Lily Johnson
    Tue, Jul 14, 2020, 2:45 PM
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