What is a requirement at the Nationals level regarding metric stations?

At the Nationals level, a fundamental requirement is that 40-60% of the stations must include calculated values. This ensures that participants not only understand the theoretical aspects of the scientific concepts being tested but also apply mathematical reasoning and data analysis skills. Calculations often involve interpreting experimental data or predicting outcomes, which are critical components of scientific inquiry and demonstrate a deeper understanding of the material.

By mandating that this percentage of stations involve calculations, the competition emphasizes the importance of quantitative skills in science, which are essential for effective problem-solving in real-world scenarios. This requirement also reflects the rigorous nature of the competition, challenging students to integrate knowledge from various disciplines within science.