The Philosophy of Mathematics Education Journal No. 27 (April 2013) is now freely available on-line. Access is via
http://www.people.exeter.ac.uk/PErnest/
See the title page with list of contents below
The first article is a transcript of a virtiual dialogue by avatars Postmodern Mathematics Education between Paul Ernest and Allan Tarp available at
http://www.youtube.com/watch?v=ArKY2y_ve_U
this was screened at ICME12 in one of the discussion groups and you might be amused or interested by it.
De Morgan Gazette 