This paper explores the challenge of diversity in an increasingly multicultural world, and examines the role of the teacher- counselor in fostering the valuing of diversity in the Greek school setting. As Greece is becoming increasingly a country of diverse populations, and the make up of the student body is changing rapidly, awareness of diversity and cultural competence become essential for teachers and administrators in order (a) to better understand, motivate and teach each individual student, (b) to foster mutual understanding, communication, and a sense of community among students from different backgrounds, and (c) to facilitate cultural exchange and mutual enrichment among diverse communities. This paper proposes that teacher training in cross- cultural competencies and skills may prove useful in addressing the need for culturally competent teachers, and gives an overview of major components of diversity training models focusing on a combination of three dimensions: (a) awareness of self and others (b) knowledge of other cultures and the worldviews of the culturally different and (c) skills necessary for intercultural communication and work with culturally different people. Finally, it briefly examines key notions of difference and otherness in the Greek thought, which can inform contemporary discourse on diversity.