David Lasagabaster is Associate Professor of Language and Applied Linguistics at the University of the Basque Country, Spain. He has published on multilingualism, language attitudes, motivation, and the linguistic and non-linguistic results of CLIL. Among other works, he co-edited the volume entitled Multilingualism in European Bilingual Contexts: Language Use and Attitudes (Multilingual Matters, 2007). Yolanda Ruiz de Zarobe received her PhD in Linguistics from the University of the Basque Country, Spain. She is now Associate Professor of Language and Linguistics at the University of the Basque Country. Her recent publications have focused on the acquisition of morphosyntactic aspects of English as a third language, multilingualism, and issues related to CLIL. She co-edited the volume Content and Language Integrated Learning: Evidence from Research in Europe (Multilingual Matters, 2009).