Luiz Amaral is Associate Professor of Hispanic Linguistics at the University of Massachusetts, Amherst. His research focuses on second language acquisition, bilingual development, language revitalization and native languages of Brazil and Mexico. He was the coordinator of the projects on Pedagogical Grammars for Indigenous Languages in Brazil (Museu do Indio/UNESCO) and Pedagogical Grammars for Otomanguean Languages in Mexico (INALI/Juan de Cordoba Library). He is currently the co-director of the Language Acquisition Research Center at University of Massachusetts, Amherst.