PME Special Issue: Bodily Activity and Imagination in Mathematics Learning. - Nemirovsky, Ricardo; Borba, Marcelo; Dimattia, Cara; Arzarello, Ferdinando; Robutti, Ornella; Schnepp, Marty; Chazan, Daniel; Rasmussen, Chris; Olszewski, Jennifer; Dost, Kevin; Johnson, James; Scheffer, Nilce Fatima (Educational Studies in Mathematics, 2004)