Lester, F. 2011. Theories of Mathematics Education Research framework is a “basic structure of ideas that serve as the basis for a phenomenon that is to be investigated” (p.69). In other words, it is the foundation on which researchers build their research activities. According to the author, research framework serves the following purposes: 1) to conceptualize and design research studies, 2) to make sense of the data, 3) to look beyond common sense, and 4) to deepen understanding. Theoretical framework guides research with a developed theory. It is, however, not without its own problems: 1) some researchers make data fit the theory, 2) data is often stripped of context to serve the theory, 3) theoretical discourse not applicable to day-to-day practice, and 4) single theory does not allow room for theoretical triangulation. Two other types of research frameworks were also introduced, and as Lester put it, “have serious shortcomings” (p.70). Practical framew...