using an iPad as a PA system
at my small elementary school (140 total students k-12) they need simple PA system to help teachers reach the back of the room
we all have iPad 2, (teachers iPad air 1). all class rooms have apple tv 2
is there a way to use the iPads as a pa system say with a bluetooth headset like my plantronics marqee 2??
is there a simple solution using a bluetooth headset with say a bluetooth speaker to make this happen or do we have to
buy a system like this
don't want a podium with speaker since the teacher walks around the room
is there an elegant solution for this
basically simple bluetooth pa system that can use our resources or a system that isn't expensive
thanks for any help 
Comments
You get wireless speakers that can connect to iOS devices over Bluetooth or Airplay, there's an Airplay one here:
http://www.amazon.com/Portable-Wireless-SmartSpeaker-Apple-AirPlay/dp/B005LUUWFC
Airplay has longer range than Bluetooth but may need both devices connected to wifi, I'm not sure if they've done a direct form of Airplay that doesn't need to use the network.
You'd then just get a megaphone app:
https://itunes.apple.com/us/app/megaphone-free/id304955183?mt=8
The problem is the wireless speakers might cost as much as a dedicated PA system.
The following would be an option for Bluetooth connected to normal speakers:
http://www.amazon.com/Belkin-SongStream-Bluetooth-Music-Receiver/dp/B00AG6NSNO
Here is an amplifier that never needs batteries:
https://www.etsy.com/listing/59654022/sounder-the-wooden-ipad-stand-ipad-dock?ref=shop_home_feat_1
It has a 4-5 decibel gain with the ipad 2.
Howard Fink