Adhesive Velcro might work ok if you were careful to attach it to the
mounting board rather than the back of the shrink wrap. But if you want to
be able to use this space more frequently, go to a wholesale framer's supply
and get brick clips. They snap over one brick and will hang work of
considerable weight. The remove easily. That way you can use the space to
exhibit on a regular basis.
I'm finding the "what do teacher's need to know" thread exceptionally