In an increasingly interdependent world, the ability to interact comfortably and confidently with people of other cultures is an important skill. This ability goes beyond cross-cultural strategies which seek to identify cultural differences and learn cultural practices in order to reduce misunderstanding. Becoming intercultural demands a deliberate and willful determination to engage in and experience another culture, and to reflect on and be transformed by that experience. It results in the development of a growing intercultural identity allowing a person to comfortably move between two or more differing cultures. Little attention has been given to connect the process of becoming intercultural with collaborative learning theory. Concern that expatriates will develop sub-cultural enclaves may lead sojourners to avoid contact with fellow sojourners. Collaborative learning theory, however, describes the value of engaging fellow learners in gaining access to knowledge communities, a process very easily compared to becoming intercultural. This multiple-case study examined the experiences of learners in an extended team-based study-abroad program, specifically how the learners collaborated with one another as a learning community in the process of becoming intercultural. The study demonstrated that collaborative learning processes can be effectively applied and can be transformative in a group of sojourners who engage one another with a goal of becoming intercultural. Study-abroad programs may benefit from lengthening time abroad to allow for deeper relationships to form. Such programs and international organizations may also benefit from providing intentional and guided structures which allow sojourners to reflectively process and collaboratively engage their host culture. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]