Picture this: An army of teenagers trudges haltingly down
long hallways. Drowsy. Bleary-eyed. Limp. This is not a
scene from a zombie movie. It's a typical school full of
teenagers who've had only a few hours of sleep.
Homework, school clubs and sports, after-school jobs,
social media, and electronic devices all play a part in
keeping teens up late. But there's also a scientific
explanation for their late-to-bed habit. According to
medical researchers, when kids reach their teens, their
biological clocks shift, and they naturally fall asleep and
wake up later. But many middle and high schools start
before 8 AM, and that makes it hard for teens to get the
sleep they need.
Fill in the blanks to explain why
teenagers seem like zombies at
school.
Teens are
because they
have busy lives, and social media and
electronic devices may
.Teens'
biological clocks also make them fall
asleep