Roberta Grassi is an associate professor of Modern Language Teaching (GLOT-01/b) at the Department of Foreign Languages, Literatures, and Cultures at the University of Bergamo. She specialized in Teaching and Promotion of the Italian Language and Culture to Foreigners (Master ITALS, Ca' Foscari University of Venice, 2001) and holds a PhD in Linguistics and Teaching of Italian as a Foreign Language (University for Foreigners of Siena, 2004), with a thesis on teachers' speech in multilingual classrooms (Parlare all'allievo straniero. Firenze, Guerra, 2007). She is interested in the principles of language learning and teaching and in plurilingual language education. Her research focuses on the plurilingual classroom context and on classroom interaction, with a particular focus on oral and written feedback. She is co-author of the volumes Verso una nuova lingua (with C. Andorno and A. Valentini; Utet 2017) and Input, output and interaction in language teaching (with E. Nuzzo; Bonacci 2016).