Digital projectors are becoming a common sight in U.S. schools. A projector can serve many roles, from letting teachers give tours of educational Web sites to having students present their projects to the entire class. With this trend come questions: Which projection technology is the most cost-effective? Which requires the least maintenance? How can one get the best price over the lifetime of this product? To help answer those and other questions, Technology and Learning (T&L) has compiled this list of essential considerations: (1) What are my options?; (2) How bright should the projected image be?; (3) Should I pay extra to get maximum resolution?; (4) Can my digital projector multitask?; (5) What about lamp life?; and (6) Portable, or built in?