Contents: Preface. Introduction. Reconceptualizing Educational Activities Into Social Action. A New Identity and New Possibilities: An Innovation of the Fifth Dimension. A System of Relations for Acting Locally, Thinking Globally, and Planning Long Term. A System of Artifacts for a Methodology in Action. Language and Identity in a Bilingual Learning Environment. The Politics of Participation: Navigating Cultural Borders. Closing Remarks: The Risk of Challenge.