Antonia Clare is an English language teaching professional in the United Kingdom. She has been an English language teacher, teacher trainer, speaker, consultant, and materials developer in many countries for over 25 years. Tammy Gregersen is Associate Professor of Linguistics at Baylor University, USA. She held full professor positions at the University of Northern Iowa, USA and the American University of Sharjah, UAE, where she was an English language teacher educator. Sarah Mercer is Professor of Foreign Language Teaching and English Studies at the University of Graz, Austria. She is also President of the International Association for the Psychology of Language Learning (IAPLL) and ambassador for IATEFL.