“…The larger study compares the development of English listening and reading comprehension skills (Pladevall-Ballester & Vallbona, 2016), writing skills (Vallbona, 2014) and oral production skills (Bret, 2014) of two groups of primary school children who were exposed to regular EFL and EFL + CLIL sessions, respectively, over a period of 20 months corresponding to two academic years (fifth and sixth grades). This larger study has also examined the effects of the CLIL subject on the participants’ language development (Pladevall-Ballester, 2016), the participants’ perceptions and beliefs about CLIL after the first year of CLIL implementation (Pladevall-Ballester, 2015) and the use of the L1 in the oral production of the participants in both groups (Pladevall-Ballester & Vraciu, 2017).…”