What is a common requirement for competitive stations in metric mastery events?

In metric mastery events, a common requirement is involving calculations and values. These events often emphasize the application of metric units in problem-solving and analytical tasks. Participants typically need to manipulate data, perform conversions, and execute computations that reflect their understanding of the metric system. This practical engagement with numerical values is essential for demonstrating competency in using metric measurements in scientific contexts, which is a core objective of such competitions.

While options might mention tools like calculators or methodologies like group discussions, they do not inherently capture the fundamental emphasis on computations that characterize metric mastery. Presenting physical models may be relevant in other contexts but does not specifically align with the primary focus of learning and applying metric calculations directly. Thus, involving calculations and values stands out as the main requirement in these events.