Canada's provincial and territorial governments are committed to implement the Labour Mobility chapter of the "Agreement on Internal Trade" (AIT) in 2009. This article examines the implications of this agreement for teacher certification and teacher education programs. It argues that the full impact of AIT will not be immediately apparent, but over the long term the new circumstances have the potential to bring about profound changes to public education. This is a two-part paper: the first half examines the development of the "Agreement on Internal Trade" with reference to its labour mobility provisions. The second half lays out what we see as four troubling aspects of the Agreement. (Contains 12 footnotes.)