This document discusses teachers' development of intercultural skills over time through their own experiences learning other languages and cultures. It profiles 5 teachers over 10 years and how their understanding of interculturality has changed from an initial awareness to fully designing intercultural learning. The teachers now actively compare cultures in the target language, elicit students' intercultural knowledge, and assess learning through cultural understanding rather than just language use. Their own intercultural learning allows them to better facilitate students' intercultural development.