“…The use of tactile activities that employ hands-on learning experiences and manipulatives have also been reported as a core feature of STEM education PBL activities as well as an applicable approach to learning for ELLs (Honigsfeld, & Dunn, 2009, p.221). Furthermore, the utilization of collaborative groups is a notable feature of STEM education (Breiner, Harkness, Johnson, & Koehler, 2012) as well as a widely supported instructional methodology for ELLs (August, & Shanahan, 2010;Calderón et al, 2011;Fillmore, 2014;Krashen, 1981;Pereira & de Oliveira, 2015). STEM disciplines are promoted as strategic components of a 21 st century education to prepare students for a knowledge-based workforce (Bybee, 2010;Marrero et al, 2014).…”