• Article  

      The embodied, proceptual, and formal worlds in the context of functions 

      Christou, Constantinos; Pitta-Pantazi, Demetra; Souyoul, A.; Zachariades, Theodosis (2005)
      In this study we use Tall et al.’s (2000) theory on mathematical concept development, which describes three worlds of operations, the embodied, the proceptual and the formal (Tall, 2004; Tall, 2003; Watson, Spirou, & Tall, ...
    • Book  

      Teaching of calculus with the use of dynamic geometrical tools. 

      Zachariades, Theodosis; Pamfilos, P.; Jones, K.; Maleev, R.; Christou, Constantinos; Giannakoulias, E.; Levy, R.; Nikolova, L.; Kyriazis, G.; Pitta-Pantazi, Demetra; Diakoumopoulos, D.; Bizza, Irene; Souyoul, A.; Bujukliev, N.; Mousoulides,Nicholas G.; Pittalis, Marios (S. Athanasopoulos, E. Papademe, 2007)