“…Thus, the research on FC has revealed significant improvements in students' performance regarding their writing skill (Adnan, 2017;Baranovic, 2013, in Teng, 2017Wu et al, 2019), listening skill (Leis, 2016), oral proficiency (Wang et al, 2018), pragmatic competence in relation to the use of refusals (Haghighi et al, 2019), and idiomatic knowledge (Chen Hsieh et al, 2017). At the same time, students' positive perceptions toward implementing the FC approach have been reported by Adnan (2017), Teng (2017), Hung (2015), and M. Webb et al (2014). When it comes to vocabulary teaching and learning, just few studies conducted so far report on higher vocabulary gain and more positive perceptions toward learning in favor of the FC model compared with the conventional approach (Xiao-Qing, 2016; H. Zhang et al, 2016).…”