Since you have a Wi-Fi Router then you may network all of them wirelessly. This is indeed a great way, users walking around with their laptops, tablets and accessing internet. And as far as monitoring is concerned, you may use the functionality of "Parental control" "Mac Address filtering" options, which would make sure that devices connected to the network would work as per your instructions.
And you may also let your printer join the network(if the printer has the wireless capability). If not, wired printers can also be used as network printers but one condition, your router should have a USB port.