Need a list of the equipment for setting up lab

I need somebody to assist me make a list of the equipment that are essential for setting up a lab(e.g. Linksys Routers, Catalyst Switches and others apart from the obvious which is computers), that will be used in the teaching and training of CCNA students. I intend to have a lab that has twenty workstations and it should have all equipment such that, the students will be guided and taught by a hired instructor who will give them a thorough preparation so that they can sit for CCNA test.
