Hi MonaPerkins,
You can take a look at the guide written by Ben Jones about the use of other screens for the interactive whiteboard
http://www.boonjin.com/smoothboard/index.php?title=IWB_installation_optionIf you are purchasing a touch screen monitor, you will not need the Wiimote.
As your students are going to use the interactive whiteboard, there is possibility of the screen getting scratched.
You may need to get a plastic/glass sheet such as using acrylic to cover the whole screen. If you are using a thick transparent sheet, you may encounter some lack of continuous tracking with the Wiimote when using with an IR pen. This may be due to IR light emitted by the IR pen to be passed through the physical material. For this, you may just need to put the Wiimote closer to the screen or readjust the positioning of the Wiimote.
Regards,
Boon Jin