Control group description
Participants assigned to the health education control group will be provided with weekly health education emails with content written at < 4th grade level. Participants in this group will also receive brief weekly scripted telephone calls from the coach (< 5 min) to determine if they received the health information and if they had any questions about the materials. Coaches will not provide sleep counseling or goal setting but may clarify terms or concepts. Participants in the control group will be instructed to maintain their current sleep schedule and will not be monitored with sleep diaries, a technique previously reported to produce little change in sleep timing over 4 weeks.