Should school start later? Some think we are setting teenagers up to fail with early hours in the classroom. There is a growing campaign to start lessons later.
Lack of sleep is a health crisis says expert
You snooze, you lose? : Experts are describing teen sleep deprivation as an “epidemic". Glossary
Slumber - Sleep.
Slugabed - A person who remains in bed due to laziness.
Trope - A recurring theme, especially in fiction. Damsels in distress, for instance, are a common trope in fairy tales and old-fashioned romances.
Melatonin - A hormone produced by your brain in response to darkness.
Circadian rhythm - The 24-hour internal clock in our brain that determines how alert or sleepy we are.
Optimal - The best.
Herald - A sign something is about to happen.
Instate - Set up.