Book excerpt: This book is about learning and ethnography in the context of technologies. Simultaneously, it portrays young people's "thinking attitudes" in computer-based learning environments, and it describes how the practice of ethnography is changing in a digital world. The author likens this form of interaction to "the double helix," where learning and ethnography are intertwined to tell an emergent story about partnerships with technology. Two school computer cultures were videotaped for this study. Separated not only by geography -- one school is on the east coast of New England and the other on the west coast of British Columbia on Vancouver Island -- they are also separated in other ways: ethnic make-up and inner-city vs. rural settings to name only two. Yet these two schools are joined by a strong thread: a change in their respective cultures with the advent of intensive computer-use on the part of the students. Both school communities have watched their young people gain literacy and competence, and their tools have changed from pen to computer, video camera, multimedia and the Internet. Perhaps most striking is that the way they think of themselves as learners has also changed: they see themselves as an active participant, in the pilot's seat or director's chair, as they chart new connections between diverse and often unpredictable worlds of knowledge.