Final answer:
Adolescents should get about 9 hours of sleep each night, according to sleep studies and recommendations by health organizations. Sleep needs generally decrease with age.
Step-by-step explanation:
The school nurse would recognize that adolescents should get about 9 hours of sleep each night to maintain optimal health and function. Research, including a meta-analysis, supports that sleep needs decline with age, and while younger children may require more sleep, adults often get less than 7-9 hours of sleep per night. Adolescents sleeping more than adults is expected, as it aligns with their developmental needs. It's crucial for high school students to aim for sufficient sleep despite the challenges that may arise from academic pressures and social engagements.