• Article  

      An empirical four-dimensional model for the understanding of function 

      Gagatsis, Athanasios; Elia, Iliada; Panaoura, Areti; Gravvani, Katerina; Spyrou, Panayiotis (2006)
      Based on a synthesis of the relevant literature, this study explores students’ abilities in four aspects of the understanding of function: problem solving, concept definition, examples of function, recognizing functions ...
    • Article  

      Exploring different aspects of the understanding of function: Toward a four-facet model 

      Elia, Iliada; Panaoura, Areti; Gagatsis, Athanasios; Gravvani, Katerina; Spyrou, Panayiotis (2008)
      Based on a synthesis of the relevant literature, this study explored students’ display of behavior in four aspects of the understanding of function: effectiveness in solving a word problem, concept definition, examples of ...