Inclusion Criteria:

• Self-identified sleep difficulties (e.g., difficulty falling asleep, staying asleep, or premature waking resulting in short or disrupted sleep).
• Ages 13 to 17 years old
• Able to understand, read, and write in English
• Melatonin naive

Exclusion Criteria:

• Obesity
• Use of psychiatric medication
• Drug(s), or supplements known to affect sleep
• History of head injury or concussion with loss of consciousness >1 minute
• Daily consumption of >1 caffeinated beverage
• Risk for any organic sleep disorder (e.g., obstructive sleep apnea, restless leg syndrome)