“…Teaching device is a key component of successful learning (Beard & Wilson, 2014). Besides, teaching device can create learning that is interactive, exciting, fun, challenging, efficient, motivating students to actively participate (Gomez Martin, Gomez Martin, & Gonzalez Calero, 2007), and has plenty of space for initiatives Provides (Myers & Adams-Budde, 2016), creativity (Ubaidah & Aminudin, 2019), independence according to talent, interest, student physical and psychological development (Posamentier, Jaye, & Krulik, 2007;Permendikbud No 65, 2013). Other data showing the importance of developing mathematics teaching device are the results of a study by (Sitopu et al, 2019).…”