I've thought about getting an Apple Watch for my kids, before getting them phones. Is it possible to use parental controls to prevent them from being used for t

I've thought about getting an Apple Watch for my kids, before getting them phones. Is it possible to use parental controls to prevent them from being used for texting/etc. during the school day? Or only to/from certain numbers (ours)? I wouldn't want them to be distracted texting their friends during class.