Collaborative work is the cornerstone of project-based learning, central to inquiry, research, organization, time and task management, design, reflection, feedback and revision, and public presentation. Some collaborations take place within a single classroom, some across classrooms in a district, some across the country or the globe. Within a project, collaborations occur between and among students, between teachers and students, and between experts and students. This article discusses technology tools that can help teachers and students with these cognitively difficult tasks of collaboratively carrying out research projects: organizing, visualizing, managing, and relating one idea to another. The discussion is divided into the following topics: The Usual Suspects (Designing; Communication within and between Groups; and Publication); and The More Unusual Tools (Research; Organization of Observations and Ideas; Visualization of Difficult Processes; Management of Project, Tasks, and People; and Reflection). A brief list of additional Web site and article resources is also included.