This collection of essays on diverse issues in collaborative work illuminates the next direction for the study and practice of collaboration in classrooms and research projects. The essays probe more deeply than any previous work into the political, social, and individual psychologies of students, teachers, and researchers working together. Beginning with a critique of the ideology of individualism, the authors treat classroom issues at all levels from middle school through graduate school. Advocating an affirmative philosophy of collaboration, the authors attempt to understand both its shortcomings and its successes, as illustrated in many examples of essays and comments written by students in collaborative projects.