The standard OC classroom:

Ceiling mounted LCD projector

pull down screen in middle of front wall or front corner (size?)

VGA cable hanging out of the wall for your laptop to connect to

Network cable to connect laptop to network

2-prong extension cord for laptop AC

3.5mm stereo audio cable for laptop headphone jack

A cabinet with a VHS/DVD player that feeds composite video to the projector

ceiling mounted audio amp feeding ceiling mounted speakers (4-6 dependin on room size)

issues:

inadequate lighting control - can't keep light off screen while providing light for instructor and students