Aurora Martín de Santa Olalla Sánchez has a PhD in Hispanic Philology and more than twenty years of experience in teaching Spanish. She has authored and co-authored seven books on teaching Spanish as a foreign language, and is currently a Senior Lecturer at the Universidad Complutense de Madrid. Belén Martín de Santa Olalla Sánchez has a degree in Psychology and in Teaching, and more than twenty years of experience in teaching English at Primary and Secondary Education. She currently works as a Lecturer at the Universidad de Castilla La Mancha (Spain) and as a Speaking examiner in Cambridge Assessment English.