My primary school had an A500 in the Year 5 classroom - this was several years before I got my first A500 though... I remember being quite jealous - I never actually got to use it, and some of my friends who owned Amigas and who were in that class came in an played games at lunch time/before school.
There were also a few (presumably high-end) Amigas on the uni network (although I never actually saw them). There were a few computers listed in the host file that were running AmigaOS. I think they were being used at the School of Art.