(ABC News) – Is your teen tired and grumpy? Part of that comes with the turf, but new research confirms that it might not be entirely their fault.
If teens feel a lot of pressure to get good grades and participate in after school activities, all while making new friends and deciding their career path, this process can make for late nights and very little sleep.
Could starting school a little more in tune with their natural circadian rhythm help?  

New research looked at how later school start times affected a group of teenage girls at a school in Singapore.

Just by moving school’s start time later by 45 minutes, the teens reported more sleep and better mood within one month. 
The American Academy of Pediatrics supports this idea.

In a 2014 statement, the organization recommended a middle school and high school start time no earlier than 8:30 am. 

In addition, they emphasized the importance of teenagers getting 8.5 to 9.5 hours of sleep a night.
While supported by science, parents of teens may be thinking “Yeah, as if.” 

During the 2011-2012 school year, only 18% of public schools started at 8:30 AM or later.

If you start schools later, critics argue,  transportation problems follow, particularly related to school buses during rush hour traffic.

Others worry that delayed school start times will make it hard to schedule after-school activities.
Regardless of your school start time, pediatricians implore teens to get a regular bedtime and limit cell phone and TV use before bed. 

Many argue that a “media curfew” would be great for teens.  It couldn’t hurt parents, either.