“…Our results consequently run counter to those studies which did not find differences between bilingual and non-bilingual groups at this educational stage (Serra, 2007;Pladevall-Ballester & Vallbona, 2016). They fall in line, however, with other investigations which found that, in the long term, CLIL improved productive more than receptive skills (Admiraal et al, 2006;Pérez Cañado & Lancaster, 2017). What happens at the end of the next main educational stage, namely, Compulsory Secondary Education?…”