New research shows that our glymphatic system clears our brains of waste while we sleep.  Lack of sleep not only impairs daily functioning and learning/memory; but this research suggests that it might also be behind the development of neurodegenerative diseases, such as Alzheimer’s.  Elementary school students should get between 10-12 hours of sleep a night, secondary students should get eight to nine hours, and adults should get seven to nine hours per night.  Tips for getting adequate sleep include: shutting off all sources of screen time at least an hour before bedtime, getting at least 30 minutes of exercise, eating healthy foods and eliminating a sugary diet, and eliminating naps.