That would depend upon your school's setup. It's not a problem to get a wireless lectern, but you may need a receiver to connect it to the school's PA system. Here's one for 1700$ grainger.com/Grainger/items/4CVP1.
Most classrooms rely on a star topology to connect their systems together.
connect modem to the E0 port. then connect ethernet cables from various ports to systems.
A typical network configuration consists of a host server that is connected to computer systems, laptops, and printers. These connections can be done wirelessly is the systems are all in relative proximity to the router.
Yes. However you will need a game card that supports multi player. You connect wirelessly to other ds systems nearby. Sometimes you can connect with just one game card. However usually each player will need the game card.
There are multiple kinds of wireless video security systems. Some of them broadcast wirelessly directly to a monitor which can have recording systems attached to it, and others broadcast wirelessly to a receiver that is connected into your computer, and software on the computer is used to record the video. They can be purchased on http://www.amazon.com
Yes, Voice systems such as IM applications (AIM, MSN, Yahoo, Skype) as well as Voice over IP phone systems (such as Vonage) work wirelessly. However, wireless signals are very slow, weak, and lossy. So the quality of the voice may be very poor or unusable, based on the quality of the wifi connection and your computer.
Simplest way is to connect with a cross cable
No, Mario Kart can only connect to other DS systems.
You can't. Macs aren't compatible with playstations or other systems.
Bluetooth is device which can connect the two systems.
You can connect through StreetPass if you have a 3DS but im not sure about the other systems
DNA in your testies