Measuring the student's oral temperature is not the first intervention in this case. Flu-like symptoms can include fever, but fever is a common symptom for many illnesses, including the flu. Given the context of a tick bite and the potential for tick-borne illnesses such as Lyme disease, it's important to consider other specific symptoms and signs related to tick exposure.

Observing for a rash around the tick bite site is the first intervention to be implemented by the nurse. This is because the presence of a rash resembling a "bull's-eye" around the tick bite site could be indicative of Lyme disease. If such a rash is present, it would be important to advise the student's parent to seek medical attention promptly. This initial observation provides valuable information about the potential development of a tick-borne illness and guides further actions.

Inform the student of Lyme disease signs and symptoms: While educating the student about Lyme disease signs and symptoms is important, it may not be the first intervention. The priority should be to assess the student's current condition and look for immediate indicators, especially considering the recent tick exposure.

Instruct the student's parent to seek medical attention: While seeking medical attention is important, it may not be the first intervention unless there is an immediate concern for severe symptoms. It's important to assess the student's current condition and gather more information before determining if urgent medical attention is necessary.