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Decades. he works for the oecd and is the mastermind behind the test which compares school systems around the world. hes written a fascinating book about the lessons hes learned. its called "world class: building a 21st century school system." welcome, andreas. first, explain the pisa test. the united states does not do very well on this test. i think what people need to understand is, it is a test that measures problem solving, intelligence, creativity. it is not just cramming of facts, right? ...