Classroom Aplication Installation

Hi all

I am currently working as a computer teacher at a local school which has a computer lab with about fifty computers, and an additional fifty are on there way.

Every few weeks I have to install new games and software on each computer by going on a computer to computer basis. I would like to know if there is a software package out there that will allow me to automatically install all the software onto all the computers through the network with minimalist user interaction.

Any help or suggestions would be greatly appreciated.