TEACHER’S USE OF THE MOTHER TONGUE IN EFL COMPULSORY SECONDARY EDUCATION Piedad Isabel Garrido Ruiz Ph.D course’s student in ‘Estudios de Filología Inglesa’ at the University of Alicante (November 2004- January 2005) ABSTRACT. The teacher’s use of the mother tongue in EFL education is considered positive for some and negative for others depending on circumstances. This paper describes the teacher’s use of the mother tongue in EFL compulsory secondary education in grammar and vocabul...