These virtual representations can be inverted, rotated,
and orchestrated into dynamic systems, to show spatial and temporal change.
This is done, for example, in the ‘slowmation’ system produced by Loughran
(this volume, Chap. 4). Such virtual representational systems are playing an
ever-greater role in science education, although doubt must remain over whether
the understanding that can be acquired from them is of the same quality as tactile
learning.