A Livebinder collection of ideas about QR codes in education.
http://livebinders.com/play/play_or_edit?id=51894

I had a conversation with a person early this year about using QR codes to
tag interesting parts of a foreshore walk near Montrose – not sure if she
proceeded but it would have been a good student project.

I only recently realised that the URL shortener bit.ly also produces QR
codes – just stick .qr on the end of the short url that bit.ly produces.
eg http://bit.ly/pdWITA.qr

An unusual use of QR codes is on headstones – these link visitors to a
website about the deceased.

See http://www.monuments.com/livingheadstone or
http://www.bitrebels.com/wp-content/uploads/2011/06/Interactive-Headstone-QR-Codes-1.jpg

And inevitably – the QR tattoo
http://www.barcodeart.com/store/wearable/qr_button/index.html . Perhaps it links to http://www.george-orwell.org/1984