• CodSimulation_2.3
• CodSimulation_Block_Wall_1.9

Computer simulations have established themselves as the third pillar of science. Simulations translate technical models into dynamic, interactive scenarios and allow phenomena to be investigated, predictions to be made and hypotheses to be tested - especially when real experiments are difficult or impossible to carry out. Accordingly, computer modeling is also gaining importance beyond computer science.

Critical engagement with simulations in the classroom therefore requires not only domain specific knowledge, but also computer modeling skills. We suggest using targeted glassboxing to support the user in understanding the subject and bridge this gap, by giving a means of comprehending the computer model behind the simulation. To allow for this to happen we propose a categorization of simulations, which depend on the support they grant to the user in understanding the underlying models.

To demonstrate this we pose you a question: Ever wondered why cod are getting smaller? This Snap!-based cod-simulation was developed to explore how human actions—like intensive fishing—can lead to evolutionary changes in animal populations. Using the example of the cod, the game helps students understand the connections between selection pressure and long-term biological change.

The game was originally used in teacher training as a paper-based activity and has now been turned into a digital version for use in the classroom. Created by computer science education students as part of a Master’s seminar on agile software development, the project was carried out in collaboration with the biology education department. The development process followed agile principles like iterative design, regular feedback, and interdisciplinary teamwork.

We will use the simulation to give a practical example and encourage others to use the opportunity of translating a physical simulation into a glassboxed Snap! simulation and make visible some of the the modeling decisions that are otherwise made subconsciously.