Part of Technology and Teaching Strategies: A Decision Making Model
Most schools own at least one or two LCD projectors. You will probably have to check the projector out from the media specialist or technology specialist in your building. If you've never used the projector before, be sure to try it out several days prior to use so if it doesn't work, you have time to get some help.
Use these links to learn more about projectors. (Note: All links open in a new window.)
Here are directions for building your own: http://www.audiovisualizers.com/madlab/lcd_proj.htm
A Buyers' Guide from Projector Central can help you get the most for your money: http://www.projectorcentral.com/buyers_guide.cfm
Since most schools have more televisions than LCD projectors, it may be easier for you to connect your computer to a television. This can be accomplished by either a direct connection or through the use of a converter. Again, this is something you will want to try out several days prior to using it in your classroom in order to troubleshoot potential problems. Use these links to learn more about connecting your computer to a television:
A basic introduction to the variety of ways to project a computer image: http://www.gunn.palo-alto.ca.us/~teacher/infocenter/monitor.html
A detailed introduction to using a scan converter: http://www.commspecial.com/bguide.htm