This study examines aspects of professional development experiences of 19 Greek Fulbright teachers of humanities regarding schooling, learning and teaching as documented in e-portfolios completed during a project of academic course and fieldwork in the United States during their collective participation in an international professional development program. Multiple influences on teachers' learning were made visible in the portfolios: cross-cultural ideas about schooling, student-centered teaching practice, international mindedness, critical reflective practice, ongoing professional development, and changes and challenges. Action plans implemented in Greek schools and documented in e-portfolios enabled multiple stakeholders to examine project impact on teachers' thinking and educational practice, including the challenges and opportunities they encountered upon their return to Greece. Recommendations for using e-portfolios in international teacher professional development projects are offered. (Contains 1 note.)