The recommended amount of sleep for a 9th-grader, or anyone between the ages of 14 and 17, is 8 to 10 hours per night. Getting enough sleep is important for physical and mental health, and can help improve academic performance and overall well-being. It's also important to establish a consistent sleep routine and avoid using electronic devices before bedtime, as the blue light from these devices can disrupt the production of the sleep hormone melatonin.
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