By all accounts, the Denver School of Science and Technology (DSST) is a special school. It was the first public charter high school in Denver to become a one-to-one laptop school, thanks to a $1 million gift from Hewlett-Packard. Even though the school accepts applicants via a lottery system and its charter requires that 40% of its students come from low-income families, its test scores are among the highest in the state, and every graduating senior was accepted to a four-year college or university. The author directed a study of DSST's one-to-one program in 2007 with funding from the Colorado Children's Campaign. The author has evaluated other one-to-one laptop programs, and he thinks DSST is noteworthy both for its success in improving student performance and for its use of laptops for assessment. DSST's one-to-one laptop program incorporates many elements besides computers, including the software installed on each laptop, training for ninth graders, professional development for teachers, an active e-mail system, technical support provided on site, and a wide variety of related technologies, including computer probes for science labs and more than a dozen computer servers supporting wireless Internet networks, e-mail, voicemail, VOIP, and other applications. But the true secret to the school's success with its one-to-one program is that DSST uses it to support its core mission. The school is clear about its goals and uses laptops, including assessments delivered electronically, to help meet those goals. (Contains 1 resource and 3 online resources.)