“…One issue in this approach is that the focus tends to be on axioms, syntactic derivations and proofs, and explanatory text is usually missing (Yackel & Hanna, 2003). Explanations and generalizations are used by other researchers when conceptualizing mathematical reasoning to problem solving (Barret, Clements, Klanderman, Pennisi & Polaki, 2006;Bishop, Lamp, Philipp, Whitacre, Schappelle & Lewis', 2014;Bjurland, Cestari & Borgensen, 2008;Chen & Herbst, 2012: Jurdak & Mounhayar, 2014Makar, 2014). This definition is similar to the definition used in this thesis and is further discussed in section 2.1.2.…”