Tammy Gregersen has taught English as a foreign or second language while simultaneously educating teachers in the same in undergraduate and graduate programs at the University of Northern Iowa (USA) and the Universidad de Atacama (Chile) since 1990. Her specific teaching interests embrace language teaching methodology, authentic classroom assessment and integrating culture; her research interests explore the emotional and psychological variables associated with second language acquisition (including positive psychology), nonverbal communication in target language interactions, and individual differences in language learning. She has co-authored four books and over 40 peer-reviewed publications and has traveled worldwide providing workshops and conference presentations.