In the context of provincial exams and teacher assigned grades, grade inflation is defined as the difference between the teacher-assigned marks and the results on a provincial exam for that particular course. It was found that higher grade inflation points to lower provincial exam results. Of the 21 high schools, École Marie-Gaëtane had the highest grade inflation, at 24.7%. With a provincial exam average of 52.3% this school is also the least achieving school in the province. In contrast, schools Polyvalente Louis-J-Robichaud, Polyvalente Mathieu-Martin, École Grande-Rivière and Polyvalente Roland-Pépin had the lowest grade inflation with values ranging from −0.7% to 9.3%. They were the four top performing schools on the grade 11 mathematics provincial exams. Similar results were found for Anglophone New Brunswick high schools, as well as for Newfoundland and Labrador schools. Despite the high marks assigned by teachers, Atlantic Canadian high school students have consistently ranked poorly in pan Canadian and international assessments.