There are a lot of differences between the education we had especially during secondary school and what the present secondary school students are experiencing.
My time was when smartphones weren't so welcomed unlike now that it is compulsory to have one.
Lolz, students feel pressured to have smartphones and many of them just go to school to flaunt their phones and pla to with them. Studies doesn't really matter to them and I don't know why schools even allow the use of phones by students with school premises.
As much as I do not support it, I also think this is an era that smartphones can not be restricted anymore because things are going more techy. Schools and teachers should just have a rule to minimize the use of phones during school hours.