Which student should be assessed first by the school nurse?

The student presenting audible wheezing should be assessed first by the school nurse due to the potential severity of respiratory issues. Wheezing is typically indicative of airway constriction or obstruction, which can result from conditions such as asthma, allergic reactions, or respiratory infections. This presents an urgent situation, as compromised airflow can lead to serious consequences if not addressed promptly.

In contrast, while the other conditions are important to evaluate, they do not present the same immediate risk to the student's health. A fever, headache from an impact, and a knee abrasion, while certainly requiring attention, typically do not pose an immediate threat to the respiratory system or overall stability as wheezing does. Prioritizing the student with audible wheezing aligns with best practices for assessing and addressing acute medical situations.