Early school starts can turn teens into zombies i need to write an essay pls

When a person wakes up early it takes a while for the human brain to wake up completely. 
say that their is a math test tomorrow,..most of the student in 1st period will get a low score on that test because its to soon to make your brain start working on difficult things,..even though you study you can know how to do it and all but at the moment its a possible chance you will forget. 

 Early school starts can turn teens into Zombies.

The reason for this is because Schools always start in the mornings and some teens can barely wake up for this movement so they fall asleep when set to do work and tasks.Every school thinks that they can keep their kids awake by starting maybe an hour late than Elementary schools,well truthfully their wrong.Many teens always stay up late and nothing is going to stop them for it because,they want to go to sleep when they feel like it not a set time.The reasons the kids that are falling asleep and not doing no work is called Zombies is because zombies in our views are always "moaning" and are always looking tired and acting tired.Kids at school with barely any rest act and sometimes look the same exact way.