Since September 2010, Ontario teachers have been working under the guidelines laid out by the document Growing Success. That document underlies all of our assessment and evaluation practices, among a number of other different topics. A lot has changed in the past decade, and while some talk about “mark inflation”, that might not actually be the case.  It’s not so much that marks have been inflated, but rather that levels (and as such, grades) have been reframed. But where do grades come from?  And what guides our professional judgement when determining it?