DEAR MAYO CLINIC: I have noticed behavioral changes and academic performance issues in my child since he returned to school in person after the holiday break. Because of COVID-19, he had been attending school virtually. As a result, he had flexibility in his schedule. Now he needs to wake up earlier to catch the bus, and we try to start bedtime rituals about 30 minutes earlier. But he has trouble falling and staying asleep at night. His teacher says he is always yawning. I suspect his school issues may be caused in part due to his lack of sleep. Do you have any advice or other suggestions to help him be more rested?