I actually do know of one girl at my DD's school who is not allowed to have her photo taken. The girls at my DD's school all police themselves to make sure no photos are taken of her. So I think that is a no brainer. Once it was explained to the girls. They all seem very active in ensuring each other don't break the rules. Yes I have joined them on Instagram sanpchat Facebook even goggle+. They have all added me too and the other mums. We are there to observe and not participate. Parents should explain to their kids why they have joined and that we are silent.
To be honest as a parent I don't care about the school evaluation. Teachers are at a school to teach. Some teachers are lucky that get classes with engaged students. Mainly because they can engage the children. Other are not so lucky and no matter how great they teach some will not care. I just don't think banning the phone will help that.
Why are phones good in class....
So they can be taught that a phone is not just for WhatsApp and selfies in the toilet. Rather it can be used for googling to expand ones knowledge. It can be used for Excel for maths. If one understands the formula. Homework can be sent to and from each other making it faster. Communication is quicker.
Apps that are useful for learning like duolingo are introduced to the children instead of just Minecraft and sim city.
Downside. .The kids that don't want to learn play on their phones type silly messages to each other. We have told our DD we have advised the school we are OK with them confiscating her phone if she is silly with it.
The ball is in her court to see if she can use it right.
I do understand its harder with unruly children. We do get pictures of her art work direct from the classroom . Even the odd Selfie with her teachers (nice when your daughter is overseas Boarding). The teachers are really good that if they are writing why your DD has had a caution. They will CC her on the email. We then write an email back to the teacher and Cc DD. She is then expected to write a very lengthy Email explaining why she did. Why its not a good idea to do it again. What will she do if a similiar situation arises. Email back to the teacher and Cc her parents. We then agree a punishment with her teacher. EngagEd parents are just has important as engaged children.
Obviously this only works with kids and parents that are engaged with school. So if they aren't then lets get all draconian on them.
Ban the phone.....detention for any misdemeanor.