This article examines the effect of curriculum-based external exit examinat
ions such as the French Baccalaureate, Canadian Diploma exams, and the Rege
nts exams in New York State on student achievement. Students from countries
with medium- and high-stakes exit exam systems outperform students from ot
her countries at a comparable level of economic development. When student d
emography is held constant, New York State students do significantly better
than students in other states on the Scholastic Assessment Test and on 8th
-grade National Assessment of Educational Progress math assessments. Not on
ly did 13-year-olds from Canadian provinces with such systems know more sci
ence and mathematics than students in other provinces, they watched less TV
, did more homework, and talked with their parents more about schoolwork. S
chools in provinces with external exams had better science labs, scheduled
more time for teaching math and science, and hired more qualified teachers
and had them specialize in teaching their subject.