do you think elementary and high school students should be allowed to use cell phone at school ?

out line:
Goal:passive agreement
Purpose: to persuade
Specific Purpose: To persuade audience of the damages of using cell phones at school.
Central idea: using cellphone at school is a big damages for taking students attentions and not understanding the lecture.
MAIN POINTS:
1-distraction
2-promotes poor & rude behaviour
3- promote Attention deficit hyperactivity disorder
4- recommendations
*** 3 academic sources***