A projection system in a classroom with an Internet connection provides a window on the world. Until recently, projectors were expensive and difficult to maintain. Technological advances have resulted in solid-state projectors that require little maintenance and cost no more than a computer. Adding a second or third computer to a classroom allows a few more students access. Addition of a projection system allows the entire class to view the screen. Now that effective classroom projectors cost less than $1,000, it may be time to consider equipping your classroom with one. Background information on the characteristics of the different projection technologies may be helpful before considering selecting one. Current classroom projectors employ either liquid crystal display (LCD) or digital light projection (DLP) technology. LCD and DLP projectors are available in similar price ranges. Each has its own strengths and limitations. Some characteristics are primarily of interest to videophiles who wish to build home theater systems, and others affect classroom use. The current generation of projectors has crossed the threshold of affordability and usability for classroom use. Because LCD and DLP technologies offer roughly equivalent capabilities, there is an incentive to continue to increase brightness and lower the price, leading to continuing price-performance advances. The consumer is the ultimate bene- ficiary of this technological arms race.