depending on the surroundings in your classroom you can use neodymium magnets to mount your Wiimote with - like this for example


(click to enlarge)
The source of mounting in this case is my fridge but any metal surface or even screw in the wall might do the trick...
I applied some double sticky tape to the lid for the batteries and attached a metal plate.
The neodymium magnet is super strong and gladly mounts to vents/ducts, metal on lamps, shelves and so on

Another magnet holds the small and adjustable tripod to the fridge and a piece of paper protects from scratches...
An telescopic rod can be used to reach the ceiling or hard to reach vents...