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Ideas and reflections from UCL's Digital Education team


Improve your mathematics and science quizzes with STACK

By Eliot Hoving, on 11 June 2020

The STACK question type is now available in UCL Moodle Quizzes. STACK allows for rigorous mathematical assessment. Until now, mathematical questions often needed to be multiple choice questions, but with the STACK question type, students can enter mathematical responses directly into Moodle.

Students can input equations directly into Moodle and see a preview before submitting.

Figure 1: Students input equations directly into Moodle, and can see a preview before they submit.

STACK questions can have multiple parts, and each part can be evaluated separately. STACK  questions can also include randomly generated components, making it a lot easier to create a range of practice questions, and also preventing student colluding during a quiz.

The feedback options for staff are dramatically enhanced. Student responses can be evaluated against a series of tests, with different feedback and grading returned to students based on the test outcomes. For example a student’s response could be automatically graded to receive a mark of 1 if it is algebraically equivalent to the correct answer, but lose a mark of 0.1 if it is not properly factorised, for a total mark of 0.9. There are many more tests as well.

Student feedback can be tailored to their response.

Figure 2: Student feedback can include tailored responses, equations and even graphical plots.

To learn more about the STACK question type, see the STACK Moodle user guide.

If you are interested in receiving support to introduce STACK into your Moodle quizzes, please contact digi-ed@ucl.ac.uk.

STACK training workshops (various) – sign up now!

The team behind the Stack question type, are currently offering training on STACK from Monday 15th June 2020 10:00-12:00 BST. Reserve your place.

Demonstration course now available at UCL

A Demonstration course which includes multiple question types created in STACK for you to test, analyse and adapt is now available on UCL Moodle. The course is based on the excellent STACK demonstration course provided by the creators of STACK.

To get access, please contact digi-ed@ucl.ac.uk

Images courtesy of the STACK Documentation page.


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