I haven’t followed up too closely (I’ve since moved to BC) but here’s a couple links I was forwarded. It seems self-censorship by teachers might be the largest effect, and that would be hard to directly measure (without going to classrooms and asking, but even then I suspect they wouldn’t necessarily admit it).
http://www.thestar.com/opinion/editorialopinion/2012/09/10/big_chill_hits_alberta_classrooms.html?app=noRedirect
http://www.thevaultmag.com/archives/3385
Good luck and feel free to send me any results so I can follow up here.
~Ian
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