I'm surprised it took this long. Cellphones should be placed in lockers or into classroom size cellphone holder/chargers that many schools use when they enter class if they are not asked to keep it in their lockers all day, save lunch.

Surprised by some of the comments, def not teachers but sound like folks who might die if you were to separate them from their phones.

Cellphones in classrooms are a problem and shouldn't be allowed whether that's 100% enforceable or not.