“…Hence, this is driving the laboratory course to become more explorative and interesting in the sense that students use their own initiative and creativity to design their own experiments (Chiu & Chiu, 2004). Due to the nature of OEL, students can improve their learning ability (Berg et al, 2003), encourage their individual creativity (Chiu & Chiu, 2004), gain self-confidence (Brickman, 2009) and feel the design environment for real industry outside the academic world (Domin, 2007). For this reason, most of the laboratory experimental works are done in many scientific areas which currently embrace open-ended working situations (Domin, 2007;Caccavo, 2011;Norliza et al, 2010;Tsarpalis & Gorezi, 2005).…”