Just a thought.... Might be more hassle than it is worth...move the loom
to each classroom in your building for a specified period of time.
(one-two weeks) give teacher some yarn, ask kids to bring in their
own... they can weave on it when they have their other work done, or
teachers can allot time for each student.
Might want to show students some examples of abstract tapestry weavings.
Do not expect results from all classes... some will do a lot, some might
not do anything. You might end up with something really cool though!