“…Number line models are intertwined with real-life contexts for integers (Akyuz, Stephan, & Dixon, 2012;Gravemeijer, 1994;Stephan & Akyuz, 2013). The research points out that comprehension of integers by students through number line models and making sense of real-life contexts of integers from a mathematical perspective are separate issues (Bobis & Bobis, 2005;Gallardo & Romero, 1999;Murphy, 2011;Van den Heuvel-Panhuizen, 2008;Vlassis, 2004). That often causes students to make sense of integers through giving meaning to signs of operations and numbers and number line models independently.…”