“…Tiered instruction has been found to be an effective strategy for classrooms with diverse groups of learners (Bender, 2002;Coil, 2007;Narvaez et al, 2010;Pierce & Adams, 2003, 2004, 2006Turville et al, 2010). In the same line, tiered instruction has also been found to benefit second language (L2) learners in various aspects including overall learning achievement (Magableh & Abdullah, 2020;Suthipiyapathra et al, 2019), listening skill (Pourdana & Shahpouri Rad, 2017), speaking skill (García Fonseca & Casallas Gordillo, 2016), reading skill (Aliakbari & Haghighi, 2014;Natsir & Asrawiah, 2013;Pasuy Pedroza & Mendieta Aguilar, 2013), and writing skill (Amkham & Chinokul, 2010). The majority of these previous studies, however, focused on tiering one or two instructional elements and not all three.…”