How to sync and charge multiple iPad devices

I have a classroom set of iPads and need to manage multiple them. How can I charge and sync multiple iPads at the same time?The first security cart for Apple's iPad have exactly what you need and they are good to work with.The NETSAFE-IPC is a new accessory that lets you plug 20 iPad devices in a giant docking station to easily sync them with iTunes. With this accessory, you are able to