%0 Journal Article %A S. A. Sorby %A T. Drummer %A R. Molzon %T Experiences in Using Spatial Skills Testing Instruments with Younger Audiences %J Journal for geometry and graphics %D 2006 %P 227-235 %V 10 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/JGG_2006_10_2_JGG_2006_10_2_a10/ %F JGG_2006_10_2_JGG_2006_10_2_a10