“…Our theoretical framework represents this approach by combining the expectancy-value theory with a categorization of epistemological beliefs about the nature of mathematics. A conceptual framework offers such flexibility to combine theories (Lester, 2009), and this particular combination has successfully been done in previous works (Tossavainen, Rensaa, Haukkanen, et al, 2021;Tossavainen, Viholainen, Asikainen, & Hirvonen, 2017).The epistemological beliefs concern the structure, quality, certainty, but also the source of mathematical knowledge (Hofer & Pintrich, 1997). In Germany, Grigutsch, Raatz, and Törner (1998) studied mathematics teachers' beliefs, identifying four categories of beliefs or orientations to mathematics.…”